Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3eaf77cee42f3fb…

MALICIOUS

PDF

41.1 KB Created: 2020-08-01 06:09:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d2ff76a9a9cdcab6eb2b7913c0c47169 SHA-1: b1e2420c813d220e025be9fde18a2305c4038240 SHA-256: d3eaf77cee42f3fbcfc09efed9ac543e8ef5e71b9bdd32bb68ab6ff2ae2a4c7c
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains a reference to the malicious URL 'https://ttraff.cc/pify?keyword=german+truck+simulator'. This suggests the primary goal is to redirect the user to malicious content or a phishing page. The presence of numerous Shopify-hosted PDF links, while some are benign, indicates a link farm strategy to potentially obscure the malicious destination.

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=german+truck+simulator
    • http://files.tasteofhomeswansea.co.uk/uploads/1/3/1/0/131071231/36c75ad.pdf
    • http://files.martinezsoccer.com/uploads/1/3/1/6/131606854/8ee4ac5.pdf
    • http://files.priorityenvironmental.ca/uploads/1/3/2/7/132740415/poturowinu-pepurefeme-zomoxiru.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/49726552648.pdf
    • https://cdn.shopify.com/s/files/1/0428/0716/5095/files/38250052258.pdf
    • https://cdn.shopify.com/s/files/1/0433/6248/4383/files/sidezojejamedesogit.pdf
    • https://cdn.shopify.com/s/files/1/0440/2829/7381/files/bemasevaz.pdf
    • https://cdn.shopify.com/s/files/1/0437/7732/7265/files/83873516782.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/14981909947.pdf
    • https://cdn.shopify.com/s/files/1/0434/1743/6327/files/korefonuveradokapofosow.pdf
    • https://cdn.shopify.com/s/files/1/0430/7678/0192/files/81297172326.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/muzoguganava.pdf
    • https://cdn.shopify.com/s/files/1/0431/3251/8549/files/7059295483.pdf
    • https://cdn.shopify.com/s/files/1/0434/7750/0057/files/94104373470.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_off000063e7.bin
4fbf03b788132a0a088035ccafc8adacf54880b0f160c60b8ead0a3be41d2efc
pdf-font-stream PDF embedded font (sfnt) at offset 0x63E7 5040 bytes
font_01_sfnt_off000074f6.bin
e3018cffa41452aaa659f65519e604ae25f85a0d57b0ffb9e84c0fe96c7d9d97
pdf-font-stream PDF embedded font (sfnt) at offset 0x74F6 10056 bytes