Malicious PDF — malware analysis report

Static analysis result for SHA-256 174713a052297cfd…

MALICIOUS

PDF

41.7 KB Created: 2020-08-02 06:41:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe8076f919bc3fceb132fa14feee5613 SHA-1: 706f271c3ebe206e59b2049a2943bb87b3fe92c7 SHA-256: 174713a052297cfd009c3acde0671a3600654e4e91ebb3c42ac0fdb021d51cc5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination of the malicious payload. The document body, though partially corrupted, suggests a lure related to a 'ps form 2976' to trick users into clicking the link. The presence of a large number of external PDF links, many pointing to Shopify, indicates a link farm strategy, likely for SEO manipulation 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=ps+form+2976-+a+pdf+fillable
    • http://files.oliviapricematchracing.com/uploads/1/3/0/7/130739746/725e398cd5bb4.pdf
    • http://files.ccsacc.com/uploads/1/3/0/7/130740571/a42ab0ae.pdf
    • http://files.fusionsoapquilt.com/uploads/1/3/1/6/131637313/vagiropaxibawu.pdf
    • http://files.iainturnbullphotography.co.uk/uploads/1/3/0/9/130968984/6016429.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/8647/8489/files/mathematical_interest_theory_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0435/8170/2301/files/nakemakuzunugaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/8475/0741/files/84567201161.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/72629804201.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/ruxofudezejoveseki.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/diwarovasu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2976/6039/files/16868077908.pdf
    • https://cdn.shopify.com/s/files/1/0430/9005/1221/files/vawosolu.pdf
    • https://cdn.shopify.com/s/files/1/0430/3365/7507/files/2486239883.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006239.bin
4cee1a77f37c27dddb405140a4de3d7fc5f37442c3bd97b6329b42eb1611652c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6239 5884 bytes
font_01_sfnt_off0000761f.bin
0680c1710634523351a4f15e2f40320113548bea174032f4a9fb39ea1b49cc60
pdf-font-stream PDF embedded font (sfnt) at offset 0x761F 10608 bytes