Malicious PDF — malware analysis report

Static analysis result for SHA-256 b53b5d20f890b933…

MALICIOUS

PDF

105.2 KB Created: 2020-09-11 05:40:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 79691ee8ba3f4567368303ca38af04d0 SHA-1: 8ee368381f02d6dc86cf3ceadca7cc0d4136fbb8 SHA-256: b53b5d20f890b933995c34c7d7958c8f47c156dca052573c9110fd0e2ece9f2d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains multiple embedded URLs, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be a lure for BTS fans. The primary attack vector is likely a phishing attempt using a deceptive PDF to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.me/wix?keyword=bts+love+yourself+answer+album+pictures In PDF document text
    • http://luzot.mansion-on-main.com/uploads/1/3/2/6/132682787/niwig.pdfIn PDF document text
    • http://files.sherieunfiltered.com/uploads/1/3/2/8/132815961/a59b4b501cc8.pdfIn PDF document text
    • http://rativ.levinefuneral.com/uploads/1/3/1/4/131407057/9263652.pdfIn PDF document text
    • http://files.literallyanythingmovies.com/uploads/1/3/0/8/130813841/pizavoru.pdfIn PDF document text
    • http://tanif.sfcchicago.com/uploads/1/3/0/7/130776811/03cff.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://static.usrfiles.com/ugd/b6edda_8b5b651f72f94fd68901ca6c734c599c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/eaf48f_e1440801c2fe4c1497a6c234f8d71f26.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a4c1fa_c5d191fdae634397abe44bcef07568d9.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/f96b02_02c3c8fe77454e11b758f5527fc5be6e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_11aa4c9333a142c0af0c7741f0e27970.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7274/9721/files/vawadovilakadi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4715/6903/files/team_tenergy_tb6ac_manual.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/5cd33b_9887d8c09fff4d04bbda52131c18f108.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e0d0cf_09c55415f7924d4e868cca0b842da22a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/d99ef3_b34a54fce45d4fab92de30d73ab79203.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/97368a_10a7faf9ac9941e9b8a03f4b2c74cd50.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cedf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEDF 26192 bytes
SHA-256: bbeafc6a06fdfa9a3adbfdcc87e30fdb06677ed0224272a7e6599c330d835194
font_01_sfnt_off00011deb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DEB 5484 bytes
SHA-256: d3e139455aa899e54401dd75bf042055654835e270aed22b3de345544f8736aa
font_02_sfnt_off00013096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13096 17020 bytes
SHA-256: 22dd93aaefec396cc6361757c017864f7d3f79dddc3814001ef379cda480fe6c
font_03_sfnt_off000164be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x164BE 16852 bytes
SHA-256: 7348236faf96ace1287a22fd1614c387cfa8075160c601958a5c2153a435b3af
font_04_sfnt_off00017cb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17CB6 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
font_05_sfnt_off00018ab0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18AB0 1932 bytes
SHA-256: e2f50d5f4e3fc2e46405e9f934f61f85e6ad4dd4f1a71686478313b05a5ff7cb

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