Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f4b33932fa152aa…

MALICIOUS

PDF

113.5 KB Created: 2020-08-25 01:10:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d04ebd6f06ae2ad621da4d2b87d7e9c2 SHA-1: 41a3876c01c107c87f38972134ffa73d67fcc52e SHA-256: 4f4b33932fa152aa9b2da792ab8153195c5296aa140891af11a7dfa6c0c1aa62
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL 'https://ttraff.ru/pify?keyword=male+uti+guidelines+idsa' is the primary indicator of this malicious redirection. Additionally, the PDF exhibits characteristics of a link farm, with numerous external links, suggesting an attempt to distribute traffic or host malicious content across multiple domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.ru/pify?keyword=male+uti+guidelines+idsa
    • http://files.elementarynerd.com/uploads/1/3/1/4/131438059/830230.pdf
    • http://retor.interimarketing.com/uploads/1/3/1/6/131606289/fetofekunanu_lakemososu_nofaxele.pdf
    • http://jalabapof.crabhousefortsmith.com/uploads/1/3/0/7/130740316/db039d7c8b3.pdf
    • https://cdn.shopify.com/s/files/1/0433/9892/2392/files/puguzepegenozano.pdf
    • https://cdn.shopify.com/s/files/1/0431/5214/6587/files/sadobogex.pdf
    • https://cdn.shopify.com/s/files/1/0431/8950/2111/files/10408550789.pdf
    • https://cdn.shopify.com/s/files/1/0427/5788/2022/files/80800052434.pdf
    • https://cdn.shopify.com/s/files/1/0430/7753/3856/files/teduresitexonopa.pdf
    • https://cdn.shopify.com/s/files/1/0430/8349/7623/files/c._p._u_information_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0429/3902/3526/files/11763447489.pdf
    • https://cdn.shopify.com/s/files/1/0454/4741/3910/files/beginner_english_grammar_test_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/8171/2287/files/31857833881.pdf
    • https://cdn.shopify.com/s/files/1/0437/6104/1559/files/gefawuxowinebapade.pdf
    • https://cdn.shopify.com/s/files/1/0431/3638/5181/files/60125007439.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_off000154f4.bin
9314276d07810bb94bc71d3eb3a20892cbd04242d73c62e7e99abeacf61d5315		 pdf-font-stream PDF embedded font (sfnt) at offset 0x154F4 4672 bytes
font_01_sfnt_off000164e4.bin
06a78bf726767dde17563dd65417ab0d697f72d169b9e2970c7cbb5ac7eb5d21		 pdf-font-stream PDF embedded font (sfnt) at offset 0x164E4 15704 bytes
font_02_sfnt_off00019586.bin
ebaa9d42c58e3fd25c8264bcf4ef2319fee467c92cf53dcc1f377a20fc8d39b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19586 16148 bytes
font_03_sfnt_off0001aa7e.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1AA7E 4324 bytes

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