Malicious PDF — malware analysis report

Static analysis result for SHA-256 942bd66fd5fde532…

MALICIOUS

PDF

45.8 KB Created: 2020-08-17 03:02:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: daeae8a044003ee2a58ac4a538037ddf SHA-1: 3ab3b50b2941f81f4fc53d73437ed2233e37804f SHA-256: 942bd66fd5fde5322e979a0501fc8f8ff601e1d6c492eae624731b6c4935f58f
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link to a known malicious redirector at ttraff.com. The document body, though heavily obfuscated, contains the URL for the malicious redirector, suggesting the primary intent is to lure the user to malicious infrastructure. No scripts were extracted from this sample.

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=keep+track+of+your+bills+template
    • http://vizafa.wakelandcolorguard.org/uploads/1/3/1/6/131636817/xusabujukofopo.pdf
    • http://gibitol.canningriverbirds.com/uploads/1/3/1/3/131398440/7912053.pdf
    • http://files.overcastvapors.com/uploads/1/3/2/6/132695457/padixodamatoxijelate.pdf
    • http://mikedo.qpamarketing.com/uploads/1/3/0/8/130874655/fajukarubuzu_vudobabotojev_xadavamumotag.pdf
    • http://files.wolfchasecoc.org/uploads/1/3/1/4/131453065/cdd859804d00f32.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vasopamomakazemujavinis.pdf
    • https://cdn.shopify.com/s/files/1/0431/4392/1820/files/silver_platform_heels_for_sale.pdf
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/zorusepopujitajev.pdf
    • https://cdn.shopify.com/s/files/1/0438/0780/1504/files/anthropometry_for_designers.pdf
    • https://cdn.shopify.com/s/files/1/0433/3443/4969/files/9179381446.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/66923604261.pdf
    • https://cdn.shopify.com/s/files/1/0434/0203/5351/files/90215275871.pdf
    • https://cdn.shopify.com/s/files/1/0431/6934/9794/files/61617184792.pdf
    • https://cdn.shopify.com/s/files/1/0428/5038/6079/files/71096209024.pdf
    • https://cdn.shopify.com/s/files/1/0431/5031/1579/files/zadotofonoxakubakiwe.pdf
    • https://cdn.shopify.com/s/files/1/0435/4375/6954/files/naveninujewebilaju.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_off00007507.bin
ab5a097403d3b79d77ef1b40fdd3bfdc7211abdaacbf9f7dc84f587c024036e4
pdf-font-stream PDF embedded font (sfnt) at offset 0x7507 5436 bytes
font_01_sfnt_off00008774.bin
f10eb41f4ac49df6d015e50935a5bb43ba712cfcf2b70daefca6e4fa930d346c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8774 10288 bytes