Malicious PDF — malware analysis report

Static analysis result for SHA-256 77ceb486afbcb4b9…

MALICIOUS

PDF

43.5 KB Created: 2020-09-02 04:20:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb7c4a5ee43652e4095bac9f7a1be866 SHA-1: ab91a48f51a60b47a39f8061d4d06fa0e179f5dd SHA-256: 77ceb486afbcb4b947e9556255b3775e0c6911c93b545b016b326698279ed5e8
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely intended to lead the user to a malicious site. The document also contains a large number of links to external PDFs, many of which appear to be generated for SEO purposes, suggesting a link farm or spamming operation. The ML classifier strongly indicates maliciousness, and the presence of a redirector URL points to a phishing or scam attempt.

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/wix?keyword=allopathy+vs+homeopathy+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/9ff9b8_ee9f6136791d46398355190c5e87fc0d.pdf
    • https://static.usrfiles.com/ugd/b8c837_f721d03694f1425494fa6545c4b64ef2.pdf
    • https://static.usrfiles.com/ugd/d017d5_78b5365c0c8446bdb56ff5cc14eb7b30.pdf
    • https://static.usrfiles.com/ugd/b42fd6_3a399ffdfa5146b7a35d5f947a600180.pdf
    • https://static.usrfiles.com/ugd/66c878_5bc2adbf8a7643cba639412d1fab12bc.pdf
    • https://cdn.shopify.com/s/files/1/0432/7872/9374/files/46617860827.pdf
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/kejojarutifimidukasaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/3110/9540/files/gerogoriralatisa.pdf
    • https://cdn.shopify.com/s/files/1/0438/2906/7933/files/vudezegomi.pdf
    • https://cdn.shopify.com/s/files/1/0435/9448/1823/files/52031461805.pdf
    • https://cdn.shopify.com/s/files/1/0430/7995/8679/files/avanzabus_app_android.pdf
    • https://cdn.shopify.com/s/files/1/0431/3343/6055/files/arizona_beneficiary_deed_form.pdf
    • https://static.usrfiles.com/ugd/0a593f_41a6b699aa624478bf9697b79a62ba33.pdf
    • https://static.usrfiles.com/ugd/db1da1_f165ec6e054f40bfa63ca7546fb5fa40.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_off00006e54.bin
2d915e54cf23bea0bbbde0d786a8b31b4740db5a1488b1def459a3f1f0317248
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E54 5336 bytes
font_01_sfnt_off00008066.bin
65c360cc151683eba84e87d17643b3b59337b34fff6b858aedf890e9b078d362
pdf-font-stream PDF embedded font (sfnt) at offset 0x8066 9596 bytes