Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4e81369290a117a…

MALICIOUS

PDF

44.8 KB Created: 2020-08-24 03:12:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 99dca2ec67a3770e222a5d0f130baa65 SHA-1: de246c5d3ea5e8ce628132311c1a42279655d334 SHA-256: a4e81369290a117aa60c6f8b8dfaf9fcf97717bec269383ded66c1f4fca4b7e4
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains a large number of embedded links, many of which point to a redirector service. One such link, 'https://ttraff.com/pify?keyword=activesync.+t-+online.+de+outlook+android', is explicitly flagged as malicious. The document body, though heavily obfuscated, contains this URL, suggesting the primary intent is to drive users to malicious infrastructure. The presence of a callback phishing lure heuristic further supports a social engineering attack pattern.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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.com/pify?keyword=activesync.+t-+online.+de+outlook+android In PDF document text
    • http://files.911bodyresq.com/uploads/1/3/0/7/130776118/natarudul-wasawebi-pifag-nisaneneduk.pdfIn PDF document text
    • http://lunuviz.junkanddisorderlyaz.com/uploads/1/3/0/8/130814017/jefovikalenin_rutusonizoxum_daler_waxeleje.pdfIn PDF document text
    • http://wusol.troupe2757goestoscotland.com/uploads/1/3/1/4/131437064/367781.pdfIn PDF document text
    • http://dixiz.duniaamir.com/uploads/1/3/1/4/131438019/kavibilazefi.pdfIn PDF document text
    • http://files.3dpd.co.za/uploads/1/3/1/4/131406835/pexevek.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/1/0464/7596/8662/files/20540524744.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1725/6605/files/phonics_reading_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8250/6647/files/15504198776.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3053/6614/files/copper_mountain_snow_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6740/0601/files/96755738916.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2744/5413/files/maxogojaliwagotatiminad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6581/8789/files/74587488840.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7779/4982/files/coalescent_theory_wakeley.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7853/3788/files/48393977898.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5095/7991/files/35761853758.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2652/9956/files/all_phylum_of_kingdom_animalia.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000071d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71D1 5212 bytes
SHA-256: ff31951f7a8566c3dd06572541ecafc9445863ffb6ea42e4b89bdd7d812c27a8
font_01_sfnt_off000083aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83AA 10004 bytes
SHA-256: 3826cb27eb15fba63c0b9aa47380f498ab525a3d4a94f63a1f42ea9f6218f115