Malicious PDF — malware analysis report

Static analysis result for SHA-256 62d3982ae5d1ee9a…

MALICIOUS

PDF

49.9 KB Created: 2020-08-18 12:59:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6efbb7b6277144ead2b728cc2a87c7c5 SHA-1: 6a406b4e939833f8d645ba84bc04a0fe2993203f SHA-256: 62d3982ae5d1ee9aa147e66fce63d4fa6670bbd37fe7aa72d61673c32746933c
154 Risk Score

Malware Insights

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

The PDF contains embedded links, including one pointing to a known malicious redirector at "https://ttraff.ru/pify?keyword=wilderness+survival+guide+pdf". The document body also contains numerous links to other PDFs, suggesting a link farm or SEO poisoning attempt. The ML classifier strongly indicated maliciousness, and the overall structure points to a phishing or redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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/pify?keyword=wilderness+survival+guide+pdf
    • http://kigukijo.iancurtisarchitecture.com/uploads/1/3/2/8/132814975/410740.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0427/8868/3932/files/fufabopujakofolozelesagu.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8317/files/pixukavevufamame.pdf
    • https://cdn.shopify.com/s/files/1/0437/7831/0306/files/nikon_coolpix_a300_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/9501/4042/files/59381440260.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/47171602999.pdf
    • https://cdn.shopify.com/s/files/1/0433/2149/1621/files/xekowebi.pdf
    • https://cdn.shopify.com/s/files/1/0436/1424/0931/files/joel_osteen_become_a_better_you_free_download.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_off0000783b.bin
6817df73828ac94c15e975315187193ee20f3d7b5dd0de47ae60c4c5cdf28685
pdf-font-stream PDF embedded font (sfnt) at offset 0x783B 4976 bytes
font_01_sfnt_off00008931.bin
147f325db53dfc8ccbdc774a2a09634a20c9700414ddb7cbdfbcbe7300fa8a88
pdf-font-stream PDF embedded font (sfnt) at offset 0x8931 10528 bytes
font_02_sfnt_off0000ad1c.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0xAD1C 4324 bytes