Malicious PDF — malware analysis report

Static analysis result for SHA-256 7da74089fc5d04e8…

MALICIOUS

PDF

50.0 KB Created: 2020-08-11 05:51:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f5f9a9af4149328295c97ba86c8fde9 SHA-1: ff1f32a13bd9667bceba48ba4c756cf4727ad155 SHA-256: 7da74089fc5d04e85744b63099e663c0ae3de214593dd762e350a9ff768dd265
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to known malicious redirector infrastructure at ttraff.com. This suggests the document is designed to lead users to malicious sites, likely for phishing or malware distribution. The ML classifier also strongly indicated maliciousness.

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.com/pify?keyword=weekly+activity+schedule+pdf
    • http://files.epbemployeehealthcenter.com/uploads/1/3/1/4/131438604/5060935.pdf
    • http://tasiw.erikgjesfjeld.net/uploads/1/3/0/8/130874493/pekoralud-semumutofeju-monalopita-ruxiwugek.pdf
    • http://files.sideofsweat.com/uploads/1/3/0/7/130776619/555d01.pdf
    • http://noxuzapu.lmstevensons.com/uploads/1/3/0/8/130874278/9956844.pdf
    • http://jatijog.reachingthroughteaching.com/uploads/1/3/2/7/132740978/3953cd86a6c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/3549/9418/files/24910696956.pdf
    • https://cdn.shopify.com/s/files/1/0431/6938/2568/files/3843235761.pdf
    • https://cdn.shopify.com/s/files/1/0433/9915/1768/files/97725494601.pdf
    • https://cdn.shopify.com/s/files/1/0438/9352/2587/files/mevalakiborozezex.pdf
    • https://cdn.shopify.com/s/files/1/0433/6723/5742/files/xavafumilewozajewe.pdf
    • https://cdn.shopify.com/s/files/1/0432/5618/4996/files/lafosanisiwe.pdf
    • https://cdn.shopify.com/s/files/1/0433/5514/4347/files/goderibirirove.pdf
    • https://cdn.shopify.com/s/files/1/0433/6300/8664/files/sepudamapode.pdf
    • https://cdn.shopify.com/s/files/1/0431/6423/7992/files/final_fantasy_7_rom.pdf
    • https://cdn.shopify.com/s/files/1/0432/5359/6310/files/tosazawebenij.pdf
    • https://cdn.shopify.com/s/files/1/0436/2482/4995/files/rujexuxilon.pdf
    • https://cdn.shopify.com/s/files/1/0431/5650/4744/files/vejiminokibem.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/talijofazejodo.pdf
    • https://cdn.shopify.com/s/files/1/0436/7355/1001/files/sabaxebi.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_off00006d87.bin
2b783991758d42b77782f47d687f642dca861bacd1622ac1a781214ff15df5c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D87 5384 bytes
font_01_sfnt_off00007fed.bin
638e7124a19998f7c95baa3d2be94f30460106d70ac73ca637343815f527d0f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FED 9944 bytes
font_02_sfnt_off0000a219.bin
05979f8b4ef68d3c608ac47bbd73065928a6418d31a4576b929107021c50144f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA219 17236 bytes

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