Malicious PDF — malware analysis report

Static analysis result for SHA-256 6808d075537fd20f…

MALICIOUS

PDF

41.8 KB Created: 2020-08-14 01:01:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6277be5139d87a02bc080846da0007ca SHA-1: ee55faadfa1c23db65e3740fcf96b4c05cc81b34 SHA-256: 6808d075537fd20fd4569928d7711fa57b77303c8213f10f2043dbeeea92798a
174 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text and URLs that suggest a lure to external sites, potentially for phishing or malware delivery. The ML classifier also strongly indicated maliciousness.

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.
  • 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.ru/pify?keyword=touch+of+heaven+sheet+music+pdf
    • http://files.sharonleegraham.com/uploads/1/3/0/7/130775063/ec42488241a.pdf
    • http://files.svkungfu.com/uploads/1/3/1/1/131164100/nurukarabesa_razabizixe_fobenolusiza_linaro.pdf
    • http://files.larisamanescu.com/uploads/1/3/1/3/131379894/xiworala-peporeva-pazaxenuzemimuk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/1044/0862/files/tikodofusume.pdf
    • https://cdn.shopify.com/s/files/1/0439/1020/1499/files/96162342766.pdf
    • https://cdn.shopify.com/s/files/1/0435/2209/7304/files/82944932138.pdf
    • https://cdn.shopify.com/s/files/1/0432/9698/1147/files/fire_and_blood_book_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/2060/7900/files/duvinenekuxoworilotedevug.pdf
    • https://cdn.shopify.com/s/files/1/0432/4841/8973/files/encounter_shankar_movie_song_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/7070/8129/files/warhammer_40k_codex_ork_v8.pdf
    • https://cdn.shopify.com/s/files/1/0440/5251/2918/files/77856534756.pdf
    • https://cdn.shopify.com/s/files/1/0432/0709/8529/files/muxameteve.pdf
    • https://cdn.shopify.com/s/files/1/0428/8384/2215/files/78666221431.pdf
    • https://cdn.shopify.com/s/files/1/0432/3078/9800/files/vubuwatoberozesofapilo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xopafomapezujiwowab.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064db.bin
b0a64bd75a96995fe6c13ce25c64969a88a20e77ed8018d5f8be039a2664def3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64DB 5276 bytes
font_01_sfnt_off000076ae.bin
5c1eeeb6d1cb21fd124b5ce78205a804d0b82415ce83cf3534415149958e39aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76AE 10320 bytes

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