Malicious PDF — malware analysis report

Static analysis result for SHA-256 a74465565a0598bf…

MALICIOUS

PDF

44.8 KB Created: 2020-08-18 16:47:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d153dc7823d0882be6d0ab3459eecc26 SHA-1: 4218fbb6b18e5157f41d70136c26a5053f224dfd SHA-256: a74465565a0598bf7213c4820208b1a1c472b9d515a22498eadb60e65f165e57
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure, specifically 'ttraff.cc'. The document body, though heavily obfuscated, contains the same malicious URL and several other PDF links, suggesting a link farm designed to direct users to potentially harmful content. 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=kawasaki+z900rs+performance
    • http://files.craig-main-connection.com/uploads/1/3/0/8/130874474/patogikaki_tubumage.pdf
    • http://files.phsofnew.org/uploads/1/3/1/0/131069887/pujonujaraxu_gexozanelo_puronivovogi.pdf
    • http://vigim.ginasphotos.com/uploads/1/3/0/7/130775195/pagizaromovis.pdf
    • https://cdn.shopify.com/s/files/1/0429/8155/6375/files/retracting_a_job_offer_template.pdf
    • https://cdn.shopify.com/s/files/1/0434/6013/3030/files/39679350501.pdf
    • https://cdn.shopify.com/s/files/1/0430/0469/0581/files/zixoduwajezute.pdf
    • https://cdn.shopify.com/s/files/1/0440/8098/8325/files/moretopa.pdf
    • https://cdn.shopify.com/s/files/1/0440/6912/6309/files/wafipuzukapuwelagu.pdf
    • https://cdn.shopify.com/s/files/1/0434/4040/6684/files/kabuvorovadabuwananoligav.pdf
    • https://cdn.shopify.com/s/files/1/0428/3380/5471/files/90323751822.pdf
    • https://cdn.shopify.com/s/files/1/0437/7139/6257/files/55820755448.pdf
    • https://cdn.shopify.com/s/files/1/0431/7249/5526/files/60014653615.pdf
    • https://cdn.shopify.com/s/files/1/0428/8013/9423/files/livajut.pdf
    • https://cdn.shopify.com/s/files/1/0432/2017/2960/files/76940276002.pdf
    • https://cdn.shopify.com/s/files/1/0437/7971/9317/files/fibaregobut.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006332.bin
0e9c82911af0d29a896759c14ce32b5b4f7deaa385a06c505986aea37e9993d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6332 5308 bytes
font_01_sfnt_off00007529.bin
3e1ef7c8b49b1b44d28f95b7b9057628f039a7cf19a7efd1b84a31131e0aeca7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7529 10312 bytes
font_02_sfnt_off00009876.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9876 4324 bytes

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