Malicious PDF — malware analysis report

Static analysis result for SHA-256 162ea3a4c635613c…

MALICIOUS

PDF

35.1 KB Created: 2020-08-22 22:55:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8da1841346298086560f47928d2d269a SHA-1: 455ea0e7f3afe4a3731f0dd2a6bb5c284859f417 SHA-256: 162ea3a4c635613c6a415ac43beb055c0608aabdd70ef12e991390964ec5f962
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.cc' with a query related to 'Centrelink aged care assets form'. This indicates a likely phishing or scam lure. The document also exhibits characteristics of a PDF link farm, with numerous embedded URLs, many pointing to Shopify domains, but the primary malicious indicator is the redirector. No scripts were extracted, but the presence of embedded URLs and the redirector strongly suggests a malicious intent to direct users to harmful content.

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=centrelink+aged+care+assets+form
    • http://mimuzuzo.rankinperformingarts.com/uploads/1/3/0/7/130738732/fefonutepuke.pdf
    • http://gepivage.villacreative.org/uploads/1/3/0/7/130740522/dedet-lonugud-fizuloj.pdf
    • http://files.theoldpostofficesuffolk.com/uploads/1/3/0/8/130814432/5628960.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/7663/3247/files/gukadazegekiburiwukudowew.pdf
    • https://cdn.shopify.com/s/files/1/0433/2689/8344/files/27095391544.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/45035229099.pdf
    • https://cdn.shopify.com/s/files/1/0432/6785/0390/files/definition_of_accounting_theory.pdf
    • https://cdn.shopify.com/s/files/1/0433/9197/5580/files/export_bookmarks_google_chrome_android.pdf
    • https://cdn.shopify.com/s/files/1/0432/4697/7179/files/25402055975.pdf
    • https://cdn.shopify.com/s/files/1/0431/8127/7352/files/11043470158.pdf
    • https://cdn.shopify.com/s/files/1/0431/2258/9853/files/zotege.pdf
    • https://cdn.shopify.com/s/files/1/0428/1086/7871/files/910538438.pdf
    • https://cdn.shopify.com/s/files/1/0432/5765/9547/files/new_holland_lawn_tractor.pdf
    • https://cdn.shopify.com/s/files/1/0433/5376/8090/files/66745331706.pdf
    • https://cdn.shopify.com/s/files/1/0437/7303/4654/files/53548061523.pdf
    • https://cdn.shopify.com/s/files/1/0436/9989/6475/files/jurnal_buah_belimbing_wuluh.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_off00004c5a.bin
6f16d830d534e47cee0ca1a2daff226c3b57ce8995ba3e758bdd5c0a7fadb6cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C5A 5308 bytes
font_01_sfnt_off00005e52.bin
0184024d3a0f724f7ff29b59113b7bd187be6aea18bace9f4abe3526c6d01de4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E52 9780 bytes

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