Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec62ffeda4321f24…

MALICIOUS

PDF

39.3 KB Created: 2020-08-16 12:49:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 294db1b75b7a093204228098ef242004 SHA-1: d9d229e06d89cb330d3dc7cb9e715f294c0d441b SHA-256: ec62ffeda4321f2478dfede874e4696b867bd868467bb74046628b803bce05e3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.001 Malicious Link

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector at 'ttraff.ru'. This indicates a phishing or redirection attempt. The document body, though heavily obfuscated, contains the same suspicious URL, reinforcing the malicious intent. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm or distribution network for 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.ru/wb?keyword=what%20does%20government%20do%20the%20preamble%20to%20the%20constitution%20worksheet
    • http://timuk.bcwine.ca/uploads/1/3/1/8/131855997/8988949488f5fbc.pdf
    • http://ribiwijo.mhagsheffield.org/uploads/1/3/1/3/131381052/netanitinug_suwiwaforazowes_sumaruv.pdf
    • http://files.csno-sdi.org/uploads/1/3/2/7/132710763/jifukav.pdf
    • http://xojotenej.ararted.org/uploads/1/3/2/7/132712380/75df6b.pdf
    • http://files.camera1.ca/uploads/1/3/1/3/131380413/pizixejawij.pdf
    • https://cdn.shopify.com/s/files/1/0431/3510/7233/files/82029017565.pdf
    • https://cdn.shopify.com/s/files/1/0436/5041/6793/files/burn_notice_sonya.pdf
    • https://cdn.shopify.com/s/files/1/0431/5247/4280/files/ischemic_heart_disease_2018.pdf
    • https://cdn.shopify.com/s/files/1/0431/2026/3322/files/54409232160.pdf
    • https://cdn.shopify.com/s/files/1/0429/8306/3715/files/fabulous_an_anthology_of_short_stories.pdf
    • https://cdn.shopify.com/s/files/1/0431/8098/2434/files/holy_hour_adoration_prayers.pdf
    • https://cdn.shopify.com/s/files/1/0433/5910/9279/files/92318583219.pdf
    • https://cdn.shopify.com/s/files/1/0431/5077/0333/files/15310364175.pdf
    • https://cdn.shopify.com/s/files/1/0429/2355/7030/files/folonigixowapowavufededi.pdf
    • https://cdn.shopify.com/s/files/1/0438/3476/9565/files/92273984410.pdf
    • https://cdn.shopify.com/s/files/1/0440/7237/0326/files/68353156918.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_off000059d5.bin
4d88e903caecb70e33e6a31c4407c909d4f668da4fd024bc103dad62ba8480f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x59D5 5856 bytes
font_01_sfnt_off00006db1.bin
ab3ae373c05b32042a4234c12faf1ada0cc5c31472089fac7c48666780beb7c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DB1 9988 bytes