Malicious PDF — malware analysis report

Static analysis result for SHA-256 67d1c2fe9d7adfb8…

MALICIOUS

PDF

58.2 KB Created: 2020-08-01 10:08:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c6a4e51e46e0afd741dfd896d0354fa0 SHA-1: 92f0cb9143275c988be85e948e06b05225537a58 SHA-256: 67d1c2fe9d7adfb8a0d730b69af0993d71b9408162131b3a0528f5db30c4ceb5
154 Risk Score

Malware Insights

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

This PDF document contains numerous links, many pointing to a link farm hosted on Shopify, designed to appear as legitimate documents but likely serving as a lure. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=invacare+platinum+xl+manual', indicating a phishing or malware distribution attempt. The ML classifier strongly supports the malicious verdict.

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/pify?keyword=invacare+platinum+xl+manual
    • http://files.legacyhomerentals.com/uploads/1/3/0/8/130874162/xajilusikiwuf_xeruz.pdf
    • http://files.grammarrugby.net/uploads/1/3/1/4/131437930/mirafirix_lagagadal_fasolul.pdf
    • http://files.riversturnpress.com/uploads/1/3/0/7/130775727/8d50b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/5311/2735/files/puwugonefakori.pdf
    • https://cdn.shopify.com/s/files/1/0432/8315/3056/files/bederumi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/87913440599.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/74140302582.pdf
    • https://cdn.shopify.com/s/files/1/0439/8986/0510/files/66034194197.pdf
    • https://cdn.shopify.com/s/files/1/0431/6043/6887/files/suwagepelojipemotepakun.pdf
    • https://cdn.shopify.com/s/files/1/0434/7235/5478/files/25172941892.pdf
    • https://cdn.shopify.com/s/files/1/0434/0976/8600/files/bisopoxavidim.pdf
    • https://cdn.shopify.com/s/files/1/0440/0631/0046/files/rulowuzagivakodelotazipur.pdf
    • https://cdn.shopify.com/s/files/1/0432/5448/1058/files/komosofakuwegufupu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9826/8065/files/86019085180.pdf
    • https://cdn.shopify.com/s/files/1/0431/7731/2405/files/jikupafigakijijafinu.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_off0000a06c.bin
7d5df8dca3870b50eb56338fec7d38488d319c6f30354e0305f565c651156de5
pdf-font-stream PDF embedded font (sfnt) at offset 0xA06C 4968 bytes
font_01_sfnt_off0000b148.bin
f0acf3d6eb5ee6798cd56c9efd5f855ff3c8ae7ed951634b96f9e34603772551
pdf-font-stream PDF embedded font (sfnt) at offset 0xB148 13692 bytes