Malicious PDF — malware analysis report

Static analysis result for SHA-256 c817ba65304c7903…

MALICIOUS

PDF

42.6 KB Created: 2020-09-01 03:04:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c47476ffaee0941a1b63983ff59e09a SHA-1: 8c01763c5c2a052a62ce66f19365ae8e9a388732 SHA-256: c817ba65304c79039395b1948133f633c947eac210348d178d917b331b21f83c
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.com, which is designed to lure users to malicious sites. The document body and embedded links suggest a content-luring tactic, likely to trick users into visiting the malicious URL. The presence of numerous PDF links, many pointing to Shopify, indicates a link farm strategy to improve SEO and potentially distribute 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.com/wix?keyword=steps+to++apache+poi+for+selenium
    • https://cdn.shopify.com/s/files/1/0432/9019/8180/files/pajugezipigajud.pdf
    • https://cdn.shopify.com/s/files/1/0462/2214/7737/files/how_to_answer_email_interview_invitation.pdf
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/problemas_de_mcm_y_mcd.pdf
    • https://static.usrfiles.com/ugd/b8c837_66982b67d4c2464abc877d2469cd7e2e.pdf
    • https://static.usrfiles.com/ugd/b28561_4b534f5d10e5405e8dafba387e03ba80.pdf
    • https://static.usrfiles.com/ugd/ac72e0_fb16bf089d1f47939e408972e636857c.pdf
    • https://static.usrfiles.com/ugd/b8c837_b4c17271b93f480986039a1dbc770a84.pdf
    • https://static.usrfiles.com/ugd/b8c837_8341131268b34d49abf5fd162fc899af.pdf
    • https://static.usrfiles.com/ugd/7f46b5_d5b636f71a6042818774e994b4c1dc5a.pdf
    • https://static.usrfiles.com/ugd/5899d5_8980157206804809a9e8b2fcf96fd5f9.pdf
    • https://static.usrfiles.com/ugd/b8c837_e981f0564dc942ea90d5373a1c1608a4.pdf
    • https://static.usrfiles.com/ugd/b8c837_59faa54f4929421b8ef1af17bd4c860f.pdf
    • https://static.usrfiles.com/ugd/ac72e0_ae64a10170f44e33a06496a52e9f65cc.pdf
    • https://static.usrfiles.com/ugd/857e61_efa6932deeaf4be4b670d7710489b5cb.pdf
    • https://static.usrfiles.com/ugd/b8c837_96f1f79f01ab40d9b0803742480f2cd7.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006125.bin
5a038040f500ea7436b1c2ba696be13fb6f8a834f98394a821aca64381ce34cb
pdf-font-stream PDF embedded font (sfnt) at offset 0x6125 5356 bytes
font_01_sfnt_off00007331.bin
12f25ba73b612ade37c33a466190a6b9d973df5977f83325d0d1b973bd2b3aff
pdf-font-stream PDF embedded font (sfnt) at offset 0x7331 13284 bytes