Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f01ea317393131b…

MALICIOUS

PDF

39.6 KB Created: 2020-08-22 20:43:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3ac264a3629c16b6c4d7ae53091ba43 SHA-1: 3c343005be0083acc77af0d0ef18a2b5a2126152 SHA-256: 5f01ea317393131b94f801445b3cfab8ac3c66695183eb8f310af4d8292e1331
162 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to Shopify domains hosting seemingly benign documents, but one primary link redirects to a known malicious domain (ttraff.ru). This suggests a link farm or SEO poisoning tactic to disguise malicious redirection. The document body text and embedded links indicate a lure related to legal forms, specifically a 'durable power of attorney form ny', which is likely a pretext to get users to click the malicious URL. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/pify?keyword=durable+power+of+attorney+form+ny
    • http://files.bodegabayhouse.com/uploads/1/3/0/7/130740049/dowuvesifuz_kinudis_miroxeki.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0461/1296/4772/files/2012_chevy_equinox_lt_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0441/3099/2280/files/fizirezejafugolerisizulop.pdf
    • https://cdn.shopify.com/s/files/1/0435/2701/2507/files/foromaxofezerimu.pdf
    • https://cdn.shopify.com/s/files/1/0450/2778/6910/files/complaint_form_template_for_employees.pdf
    • https://cdn.shopify.com/s/files/1/0434/8837/9032/files/xipize.pdf
    • https://cdn.shopify.com/s/files/1/0435/1701/8267/files/polaris_800_sportsmen.pdf
    • https://cdn.shopify.com/s/files/1/0429/2398/3015/files/capistrano_valley_christian_school_uniform.pdf
    • https://cdn.shopify.com/s/files/1/0431/0358/4409/files/ridirojuxef.pdf
    • https://cdn.shopify.com/s/files/1/0435/7960/5147/files/is_trinidad_james_dead.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_off00005f04.bin
6866a267580a3a32641ae1d9cb3ce61f26ecfcf5e40725375dddc4623b8f1009
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F04 5200 bytes
font_01_sfnt_off000070b9.bin
055a7dd15425de596a75d63f927f6fcb12557128db1720ce5ac4f2e5f1bec42c
pdf-font-stream PDF embedded font (sfnt) at offset 0x70B9 9644 bytes