Malicious PDF — malware analysis report

Static analysis result for SHA-256 020d286dbee983f3…

MALICIOUS

PDF

52.8 KB Created: 2020-08-05 14:48:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8fd6f2b0e112b8014ff3c1c2ec6ecb1c SHA-1: ead186333f161a8631d4c056f4e64523ea3de6d3 SHA-256: 020d286dbee983f3a63727459dafa3a9445c6916ec36b8e48d6f858a620b09ed
154 Risk Score

Malware Insights

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

The sample is a PDF document that contains a mass of external links, many of which are directed towards a redirector service. This behavior is indicative of SEO poisoning or a phishing campaign designed to lure users to malicious sites. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=amplitude+modulation+using+matlab+pdf
    • http://files.alanbirtwistle.com/uploads/1/3/1/3/131383664/werox_xapedewero_bemidituziv_zurer.pdf
    • http://files.josesaladbar.com/uploads/1/3/2/6/132682093/928054.pdf
    • http://files.highbanks.marketingfactorygroup.com/uploads/1/3/0/8/130874541/5730452.pdf
    • http://files.sathiavanee-veeramoothoo.com/uploads/1/3/1/8/131871891/jidutemepupaz.pdf
    • http://files.stevevergara.com/uploads/1/3/1/3/131382583/8b52d5615.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/4383/9385/files/fawef.pdf
    • https://cdn.shopify.com/s/files/1/0427/7462/6470/files/online_calculator_with_tape.pdf
    • https://cdn.shopify.com/s/files/1/0437/7539/3944/files/92671741450.pdf
    • https://cdn.shopify.com/s/files/1/0434/5079/4145/files/8320899238.pdf
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/97184046270.pdf
    • https://cdn.shopify.com/s/files/1/0434/5511/9520/files/seconds_to_milliseconds.pdf
    • https://cdn.shopify.com/s/files/1/0429/6287/8618/files/79163769174.pdf
    • https://cdn.shopify.com/s/files/1/0428/8331/7926/files/sindrome_de_apnea_hipopnea_obstructiva_del_sueo.pdf
    • https://cdn.shopify.com/s/files/1/0430/7514/1794/files/vanejokorisubak.pdf
    • https://cdn.shopify.com/s/files/1/0427/6187/9719/files/sama_veda_in_odia.pdf
    • https://cdn.shopify.com/s/files/1/0431/5430/9280/files/vebikeve.pdf
    • https://cdn.shopify.com/s/files/1/0436/0408/2851/files/53738080146.pdf
    • https://cdn.shopify.com/s/files/1/0431/1062/9532/files/69021585108.pdf
    • https://cdn.shopify.com/s/files/1/0433/7709/8902/files/38940501128.pdf
    • https://cdn.shopify.com/s/files/1/0431/0165/1105/files/52585943143.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000701b.bin
9280ee65a0a97383d2d9202d171a64561bb79768e1c6e7965f3e6030ca38f959		 pdf-font-stream PDF embedded font (sfnt) at offset 0x701B 5392 bytes
font_01_sfnt_off00008256.bin
4c3f736cdf3f0df632764197a0f8bd5dce963a86471b78928ae4f3685299a9f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8256 14572 bytes
font_02_sfnt_off0000b06b.bin
2273d2f731bf59a8a8908055ba78c2617298a1e9dd736f51235982cec4781911		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB06B 16128 bytes

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