Malicious PDF — malware analysis report

Static analysis result for SHA-256 09cad3b224fb0697…

MALICIOUS

PDF

33.8 KB Created: 2020-08-02 13:24:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 35631604343c83153fb599e59fc01ce6 SHA-1: 7620b056aa05b4cf7cc55b59383fd45f00ef13f2 SHA-256: 09cad3b224fb0697ae0d5b4190c6891073f75f41074afe26fa31769cff5c02ec
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, a common tactic for SEO spam and phishing. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=2015+nissan+altima+owners+manual'. The document body, though heavily obfuscated, contains text suggesting it is an owner's manual, likely a lure to encourage clicks. The ML classifier also strongly indicated maliciousness.

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=2015+nissan+altima+owners+manual
    • http://files.theworldcitizen.org/uploads/1/3/0/7/130775634/xewukikivoxasobipo.pdf
    • http://files.kellytobias.com/uploads/1/3/1/1/131164176/5ccc58.pdf
    • http://files.job2ten.org/uploads/1/3/2/3/132303353/badedu-luvukef-rijojepolu-letemi.pdf
    • http://files.weavingourwisdoms.com/uploads/1/3/1/4/131453679/38168.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/0537/0787/files/poxifelixokivilune.pdf
    • https://cdn.shopify.com/s/files/1/0434/7363/3432/files/85746845090.pdf
    • https://cdn.shopify.com/s/files/1/0432/2800/4507/files/28626287894.pdf
    • https://cdn.shopify.com/s/files/1/0432/5425/1670/files/45509580491.pdf
    • https://cdn.shopify.com/s/files/1/0432/8649/5396/files/riripurubegaxo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8904/3358/files/14573102710.pdf
    • https://cdn.shopify.com/s/files/1/0429/2447/4531/files/36109018019.pdf
    • https://cdn.shopify.com/s/files/1/0433/9499/0247/files/vutar.pdf
    • https://cdn.shopify.com/s/files/1/0427/8039/3639/files/fix_it_utilities.pdf
    • https://cdn.shopify.com/s/files/1/0432/8865/8078/files/85203487846.pdf
    • https://cdn.shopify.com/s/files/1/0429/3020/8924/files/67127254960.pdf
    • https://cdn.shopify.com/s/files/1/0437/4275/7029/files/jesexipafogusevakola.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_off00004717.bin
88cab533d34fd0b2e656512b8d29c9336d83abfb1b4e9cae12b38340f772d0e8
pdf-font-stream PDF embedded font (sfnt) at offset 0x4717 5276 bytes
font_01_sfnt_off00005907.bin
cdbe300b3f52481eca17e5348e04e16e412fab296008ff7b02564bb4ed30524e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5907 9784 bytes