Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8212bc45a078acf…

MALICIOUS

PDF

51.9 KB Created: 2020-08-18 20:45:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f641bc789cf448051297e3ed23df5183 SHA-1: 421444a38570bd3e34bd3a8d8584de261be56fc3 SHA-256: d8212bc45a078acf673de31aa956c9042a004e425b97cf365ca2e3fec1dbccbc
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination. The document body, though heavily obfuscated, contains text related to a Bhojpuri film song, suggesting a lure to entice users to click the malicious link. The presence of numerous other links, many pointing to Shopify domains, indicates a link farm strategy, likely for SEO poisoning or to host further malicious content.

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=raja+babu+film+song+bhojpuri
    • http://ribiziz.andrewandykeithanderson.org/uploads/1/3/0/9/130969723/f5f0386f64e2dd5.pdf
    • http://files.brickhousellamas.com/uploads/1/3/0/7/130739693/gexawenik_jozoboge_baberogezi.pdf
    • http://files.fbclocustgrovepreschool.com/uploads/1/3/1/6/131637484/kilavojenejisowefo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5181/8903/files/87751581340.pdf
    • https://cdn.shopify.com/s/files/1/0433/5799/5160/files/97675778498.pdf
    • https://cdn.shopify.com/s/files/1/0439/8232/3870/files/66931155481.pdf
    • https://cdn.shopify.com/s/files/1/0428/9154/2681/files/36777550344.pdf
    • https://cdn.shopify.com/s/files/1/0432/0978/5499/files/zaxitag.pdf
    • https://cdn.shopify.com/s/files/1/0438/3444/1885/files/jadofozomolafelusiz.pdf
    • https://cdn.shopify.com/s/files/1/0437/8047/2984/files/possessive_adjectives_spanish_quiz.pdf
    • https://cdn.shopify.com/s/files/1/0430/8307/1650/files/akbar_birbal_stories_in_english_with_moral.pdf
    • https://cdn.shopify.com/s/files/1/0437/9095/8749/files/33421015705.pdf
    • https://cdn.shopify.com/s/files/1/0429/4203/8182/files/fagiraziseretofopetu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6400/8605/files/28091797382.pdf
    • https://cdn.shopify.com/s/files/1/0437/7113/4106/files/discord_formatting_text.pdf
    • https://cdn.shopify.com/s/files/1/0432/4176/7072/files/ropejoxamerumijedipinif.pdf
    • https://cdn.shopify.com/s/files/1/0431/0047/1456/files/mejidomelowevaduperewafi.pdf
    • https://cdn.shopify.com/s/files/1/0434/2343/2854/files/73280778602.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/

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f0a.bin
dc159d6e8442b9c42c61e1a21848e8c0bc28b5e88038521437cf40f96b77237a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F0A 5224 bytes
font_01_sfnt_off00007094.bin
8e0f0a90b5a01c3b53ef722bf18ffaa7db48e45caef63a510f8c69295e7dfcf0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7094 9736 bytes
font_02_sfnt_off0000919f.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x919F 4324 bytes
font_03_sfnt_off00009fa0.bin
703fef63b895aff174b8b372b81f50872d196d50076b05c269c8245bdb6f098e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FA0 10968 bytes

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