Malicious PDF — malware analysis report

Static analysis result for SHA-256 a973abdafd7491d3…

MALICIOUS

PDF

34.9 KB Created: 2020-08-25 03:46:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3ef9ca07713aa42d1a24e75e38ee6c28 SHA-1: 872887f8e3972229058319ada7861319f22e4a5f SHA-256: a973abdafd7491d34bef627c1a9e3b3074467322478b18b0089b461a579544e3
162 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector (ttraff.cc). The document body, though heavily obfuscated, contains text related to a 'doorbell chime free' offer and also includes the malicious redirector URL and several Shopify-hosted PDF links. This suggests a social engineering lure designed to trick the user into clicking the malicious link, likely to download further malware or redirect to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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=doorbell+chime++free In PDF document text
    • http://files.edgarsameriks.com/uploads/1/3/1/4/131483209/gaxelemeg-jukiselipuboz-wozifujuma-tapakeled.pdfIn PDF document text
    • http://wojogof.lonestarfloor.com/uploads/1/3/0/8/130814687/sowilojijelapo-wawoxe.pdfIn PDF document text
    • http://sijifuken.thepurplebowteaneck.com/uploads/1/3/1/3/131398521/2b19f52f02772a.pdfIn PDF document text
    • http://files.southheights.net/uploads/1/3/0/7/130740464/teneditewej_zilumufudami_tiwowexekepaf_poxed.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/1/0435/8704/3496/files/nuxulometedaga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5180/3033/files/kifopokosigagirefalako.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3124/8539/files/bhartiya_vidya_bhawan_admission_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2869/9553/files/grey_knights_8th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9282/0647/files/the_balanced_scorecard_kaplan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/canales_de_comercializacion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7100/5082/files/pedagogia_activa_definicion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/lewasam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3136/2725/files/warovasenewi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6353/2951/files/grade_5_go_math_practice_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/9605/9547/files/problems_in_mathematical_analysis_2.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B20 4872 bytes
SHA-256: 58088cb1ccc6a39a24c98aa14d47d75d7b164d9e3b416eee170d372078f5d6b2
font_01_sfnt_off00005b93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B93 10412 bytes
SHA-256: f3d230357c9b97d588ddb9fa5a5728f85d75f6c3474e0c35de5114a2edb4441d

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