Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dd7d7d95f824e24…

MALICIOUS

PDF

37.1 KB Created: 2020-07-31 20:46:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 53fc2841b6664e27c4c903164aa78cb3 SHA-1: ac9e40b399b8558fe62dc0c41290e02b283c35fb SHA-256: 6dd7d7d95f824e24278692c84730b8efd384057921b8340f31a03653771e847c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm or SEO spam operation. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is likely the primary malicious payload delivery mechanism. The document body is heavily obfuscated and contains the redirector URL, indicating an attempt to disguise its malicious nature.

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.com/pify?keyword=asus+usb-+bt400
    • http://files.bretttrn.com/uploads/1/3/0/9/130969192/b6ab695ea5e1e.pdf
    • http://files.beaconforlife.com/uploads/1/3/1/0/131070938/gamegolo-rotozamewanof-xosuwokarud.pdf
    • http://files.stevewhyteguitar.co.uk/uploads/1/3/0/7/130739892/930138.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/4501/9035/files/56383548274.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51982080438.pdf
    • https://cdn.shopify.com/s/files/1/0441/4259/2152/files/5412432669.pdf
    • https://cdn.shopify.com/s/files/1/0430/4257/0402/files/zedezotekazi.pdf
    • https://cdn.shopify.com/s/files/1/0432/3111/7467/files/11224972656.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/95909873105.pdf
    • https://cdn.shopify.com/s/files/1/0431/9189/4176/files/59606323754.pdf
    • https://cdn.shopify.com/s/files/1/0433/2955/2552/files/gomurixukubel.pdf
    • https://cdn.shopify.com/s/files/1/0428/2921/7958/files/xadevimusunopakivew.pdf
    • https://cdn.shopify.com/s/files/1/0431/4054/6714/files/15120448587.pdf
    • https://cdn.shopify.com/s/files/1/0433/4977/0408/files/xezokefewelalumar.pdf
    • https://cdn.shopify.com/s/files/1/0438/3798/0834/files/votajupalepiwigexesowu.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_off000048da.bin
eb4932dd21685858f63fe044febd1241a480f6a176babd7c29b39f96ae99b833
pdf-font-stream PDF embedded font (sfnt) at offset 0x48DA 4732 bytes
font_01_sfnt_off0000591b.bin
2e0e35fd42dbc82de8695905eb9b3449ee0677e3e93b685f81e466d1e98af820
pdf-font-stream PDF embedded font (sfnt) at offset 0x591B 14848 bytes