Malicious PDF — malware analysis report

Static analysis result for SHA-256 13b6496e9e51c9fa…

MALICIOUS

PDF

39.9 KB Created: 2020-08-18 20:32:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cb9a126b4eaa86ba942b33d11c21e67f SHA-1: 1f9659db78d2ec0158e807a93fd64e80d632e8a1 SHA-256: 13b6496e9e51c9fa5a12acff8636b396984cd5868287ea14a9de2740fbd464e5
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a malformed stream and links to known malicious redirector infrastructure, specifically 'https://ttraff.cc/pify?keyword=bandeya+ringtone++320kbps'. It also embeds a large number of links to external PDF files, many hosted on Shopify, suggesting an attempt to create a link farm or distribute further malicious content. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • 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.cc/pify?keyword=bandeya+ringtone++320kbps In PDF document text
    • http://files.hypefitters.com/uploads/1/3/1/4/131407890/2262676.pdfIn PDF document text
    • http://files.blues-n-brews.com/uploads/1/3/1/8/131856392/lukexog_jegisezos_mogajuzetafumuj.pdfIn PDF document text
    • http://jelisalo.mumfullofdreams.com/uploads/1/3/1/4/131408791/dokumobikev-lanavasepute-filirise-fivisi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2036/1629/files/ratadurugeno.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5107/3174/files/16010166272.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9878/3382/files/dipofozipoba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5732/3933/files/ligafawutunawimimupi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2566/9028/files/27011005785.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3681/9104/files/lesaxumake.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0667/1517/files/wadokowo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1714/0386/files/euro_pick_up.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 5

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4536 5888 bytes
SHA-256: b4fc2986a3ddc4cb69dc665c6ec670dbe11935e023163ef1c3d7e928e31e1836
font_01_sfnt_off0000594e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x594E 9968 bytes
SHA-256: abc7459402727009d43b91926c227679ff185ee24fe7424cf30b9de7bd6a5a6f
font_02_sfnt_off00007b86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B86 16752 bytes
SHA-256: 4ce524145b3dce8fe9ff147c1b2aab3da9c0c4ec2c07cc378771c33728cf9a90

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