Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ed6efac53aa54de…

MALICIOUS

PDF

44.7 KB Created: 2020-08-31 22:08:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b0d4c811a02946c01c49418da400440 SHA-1: 2a8fb6dd7be826aa076dd30e3e91279997daadea SHA-256: 0ed6efac53aa54dea328886daba9e5965b2c7052095d33bf76cdf33e700ed991
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically the URL https://ttraff.me/wix?keyword=amgen+assist+prolia+form. The document body also contains this URL, suggesting a phishing or scam attempt disguised as a form. The presence of numerous other PDF links, many pointing to static.usrfiles.com, indicates a potential link farm or SEO manipulation tactic to 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.me/wix?keyword=amgen+assist+prolia+form
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/5a1791_483301c45ec347079f6dda8037ecdfed.pdf
    • https://static.usrfiles.com/ugd/dc8a8e_fc2950ebad714d1786732d9dea237a70.pdf
    • https://static.usrfiles.com/ugd/b8c837_0966f76519d5435fb58d3384d9b6cfcb.pdf
    • https://cdn.shopify.com/s/files/1/0434/5469/3529/files/android_indirme_yneticisi_etkinletirme.pdf
    • https://cdn.shopify.com/s/files/1/0431/2917/6232/files/4586874612.pdf
    • https://cdn.shopify.com/s/files/1/0434/6452/3926/files/nubidorirena.pdf
    • https://static.usrfiles.com/ugd/b8c837_27e7badc137c433c9697aaf95c72375f.pdf
    • https://static.usrfiles.com/ugd/b8c837_6aae4917859e4932aac2d8b100caaea6.pdf
    • https://static.usrfiles.com/ugd/b8c837_7f4278d71d22471597b283dbeea6eddd.pdf
    • https://static.usrfiles.com/ugd/45e30f_952c05bcc78144209d38e94436d8b3b3.pdf
    • https://static.usrfiles.com/ugd/b8c837_7430fe01572444d5a71cf611f5bbdda0.pdf
    • https://static.usrfiles.com/ugd/34ec99_eee6d24f3fed418a921866167e757948.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000601f.bin
a7168f2223aa6e5ea46a57ee6387f24f6908db175e5a6c4a370946255e173dec
pdf-font-stream PDF embedded font (sfnt) at offset 0x601F 4148 bytes
font_01_sfnt_off00006eba.bin
264ab43d134c5169d9b90c574b25e202676276f8bc00ff9700c3c880d85657c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EBA 5212 bytes
font_02_sfnt_off00008062.bin
458adb7bca208bc91fb1ef8a2111ed750f6ae6b777a26bb68b2e60f51030e846
pdf-font-stream PDF embedded font (sfnt) at offset 0x8062 10836 bytes