Malicious PDF — malware analysis report

Static analysis result for SHA-256 73aeec8495c255d0…

MALICIOUS

PDF

35.6 KB Created: 2020-08-18 13:51:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3d50ff80b9c95afa2218f702d855149 SHA-1: 73f9c15f0fbf30a31bdcbe709c622ed8e76ae3c8 SHA-256: 73aeec8495c255d078acfdbff236699030895cb49507cc927b3ac3d8f1b3c95a
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK pointing to ttraff.com. The document body, though heavily obfuscated, contains the URL https://ttraff.com/pify?keyword=basilica+area+crossword+answer, suggesting a lure to a malicious redirector. The presence of numerous Shopify links, some flagged as benign and others unknown, indicates a link farm strategy. No scripts were extracted, but the overall structure and heuristics suggest a phishing or redirection attempt.

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=basilica+area+crossword+answer
    • http://files.fabioonrack.com/uploads/1/3/1/8/131856698/9832584.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/0247/8237/files/medodamopagoxokapavawajab.pdf
    • https://cdn.shopify.com/s/files/1/0427/5005/0460/files/36583055085.pdf
    • https://cdn.shopify.com/s/files/1/0434/8284/1250/files/mikalox.pdf
    • https://cdn.shopify.com/s/files/1/0433/3069/9414/files/jajabaselelarurad.pdf
    • https://cdn.shopify.com/s/files/1/0438/2287/4781/files/ielts_synonyms_words_list.pdf
    • https://cdn.shopify.com/s/files/1/0430/8546/3713/files/63456243661.pdf
    • https://cdn.shopify.com/s/files/1/0433/8660/1635/files/72284567170.pdf
    • https://cdn.shopify.com/s/files/1/0437/0356/6486/files/sopoxurusu.pdf
    • https://cdn.shopify.com/s/files/1/0438/2218/6656/files/80045781430.pdf
    • https://cdn.shopify.com/s/files/1/0437/8080/0674/files/bulacan_history.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004225.bin
5269fab8039767427c0f9f3fc84486bc31176799545752a9ceeccf7580afdc11
pdf-font-stream PDF embedded font (sfnt) at offset 0x4225 4784 bytes
font_01_sfnt_off00005266.bin
b367778320e892483c25db6ed3496348f4367659ccfbae34488421803d5e1e7a
pdf-font-stream PDF embedded font (sfnt) at offset 0x5266 9756 bytes
font_02_sfnt_off000073d4.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x73D4 4324 bytes