Malicious PDF — malware analysis report

Static analysis result for SHA-256 76a5936ad81f717a…

MALICIOUS

PDF

31.5 KB Created: 2020-08-15 04:46:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 623c4f6bf2301b45c765a0a8f71ea6ce SHA-1: adaeca803136b3f901bb944a69b38cf60187f89d SHA-256: 76a5936ad81f717a38c674d30faa95437771c3bf6eb9700da9b5f4456ede03d3
234 Risk Score

Malware Insights

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

The PDF contains numerous links, including a critical redirector link to 'ttraff.cc' which is associated with malicious activity and lures users with 'android keylogger apk'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary purpose is to redirect users to download malware. The presence of a large number of external PDF links further indicates a link farm or SEO manipulation tactic to distribute malicious content.

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.
  • 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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=android+keylogger+apk In PDF document text
    • http://files.acmdev.net/uploads/1/3/1/4/131438245/c930290ef648522.pdfIn PDF document text
    • http://files.sydneyschiffdanceproject.com/uploads/1/3/0/7/130775337/2689919.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/1/0440/6408/0024/files/revazadetinidojuter.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6627/8556/files/94716195490.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7057/7045/files/ecological_systems_theory_social_work.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2325/4183/files/arbitration_act_sri_lanka.pdfIn macro / runtime command snippet
    • https://cdn.shopify.com/s/files/1/0433/6621/9941/files/muzulidefiweromolomilejeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1965/7628/files/jilugododofidibosarowaxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/73041257332.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0862/9659/files/ruribijibivuserit.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_off0000409a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x409A 5104 bytes
SHA-256: 4db6dceece3c1a7e89615bdc441442307c52e1acdc186a0cbd453e18025dc0af
font_01_sfnt_off0000520e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x520E 9340 bytes
SHA-256: d45b82cb883e2656d9e38fb4673c6a8b3ff3d80a4315f32a16b267d12784f496

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