Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b0a3909ba30d18a…

MALICIOUS

PDF

58.8 KB Created: 2020-08-22 13:20:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a75a57c1f7ef61e94bd30706b7e4aaa5 SHA-1: b86ce4b6fbf31765aa4606d2f50c102444c45c8a SHA-256: 8b0a3909ba30d18a2f80f31e095dea5afd9cb6b75dda649512142ac484d7be1a
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains multiple heuristics indicating malicious intent, including links to known malicious redirectors and a link farm. The document body, though heavily obfuscated, contains a URL that aligns with the malicious redirector heuristic. The presence of numerous external PDF links suggests an attempt to distribute further malicious content or engage in SEO poisoning.

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) or Microsoft license-boilerplate 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.ru/pify?keyword=reponse+castor+informatique+2016 In PDF document text
    • http://maxeka.bcartglass.com/uploads/1/3/0/9/130969690/9f757be8a8.pdfIn PDF document text
    • http://files.praktische-philosophie.org/uploads/1/3/0/7/130776067/d535c894f57a8.pdfIn PDF document text
    • http://files.imandycole.com/uploads/1/3/0/7/130775685/zemekafudimoruri.pdfIn PDF document text
    • http://files.malcolmcounseling.com/uploads/1/3/2/6/132696210/14969b7d3553.pdfIn PDF document text
    • http://files.shaktiiasacademy.com/uploads/1/3/2/7/132740580/mopikobobubux.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/1/0433/8463/5548/files/wivifidokokutobitogebe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8713/4882/files/tatewerurora.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3555/0111/files/sotov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/1158/7478/files/whatsapp_status_malayalam_romantic.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/1410/5760/files/80260228965.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3532/0735/files/grade_12_mathematical_literacy_textbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2371/9845/files/xabiwijokujegif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4108/6888/files/jufulasegefamol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3646/5559/files/performance_appraisal_research_paper.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6590/9146/files/xesudinatetofawufinuxanef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4211/9592/files/68983796858.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0010/3073/files/30282857092.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7230/6846/files/teri_aankhon_ka_kajal_song_wapking.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_off0000a62b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA62B 5744 bytes
SHA-256: 5d8e08a85d96268d922848794f47cb795d0225c142edaaca01aa92591831adf8
font_01_sfnt_off0000b9aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9AA 11312 bytes
SHA-256: 0c73e3daef5f2ed5287f18bc09a81c5fafcb61b8b1298191e1d6b010243ba37e