Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a3266eec5977165…

MALICIOUS

PDF

36.1 KB Created: 2020-08-07 04:21:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b2066ce8c33f10277301348bda73b94 SHA-1: f0def28d1e1460ff092174af8e2f4ae96bd9d465 SHA-256: 0a3266eec597716506991a87196c17143c0f3c7fbc0c58b77be08f922b0a5d5d
174 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying it as a link farm pointing to malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that aligns with this finding. The presence of embedded links and the overall structure suggest an attempt to direct users to malicious content, likely for phishing or malware delivery.

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=aliens+love+underpants+book+pdf
    • http://zemonikeg.brunswickelections.com/uploads/1/3/1/6/131606552/gologakoxujifa.pdf
    • http://files.ginny-frings.com/uploads/1/3/1/3/131381658/2678371.pdf
    • http://files.adentakorea.com/uploads/1/3/1/8/131871894/5362217.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7095/5424/files/arduino_uno_starter_kit_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/1737/1801/files/fopenixenuzivogifuvenago.pdf
    • https://cdn.shopify.com/s/files/1/0434/4456/8216/files/ganapati_atharvashirsha_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0429/3692/6374/files/40136135156.pdf
    • https://cdn.shopify.com/s/files/1/0428/5192/6183/files/renozadobugasimipelato.pdf
    • https://cdn.shopify.com/s/files/1/0432/6152/6166/files/2188084648.pdf
    • https://cdn.shopify.com/s/files/1/0430/6416/4506/files/89376349398.pdf
    • https://cdn.shopify.com/s/files/1/0437/1342/9655/files/remupexajuwiv.pdf
    • https://cdn.shopify.com/s/files/1/0431/6377/9240/files/59066409238.pdf
    • https://cdn.shopify.com/s/files/1/0432/6762/1028/files/lifopamum.pdf
    • https://cdn.shopify.com/s/files/1/0428/4815/7859/files/kijililibiremimosaguk.pdf
    • https://cdn.shopify.com/s/files/1/0433/8286/6072/files/8386881011.pdf
    • https://cdn.shopify.com/s/files/1/0447/9402/0000/files/google_chromecast_wallpapers.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_off00005048.bin
be9214fa2c15c5bb24246c091bcf70cb79acb408947b30f9a967b4f483dbf4e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5048 5288 bytes
font_01_sfnt_off00006252.bin
ede1629f3356fa52b4ddbd1744aaeba8af7a8603b9ce495a7997222501804669		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6252 9736 bytes

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