Malicious PDF — malware analysis report

Static analysis result for SHA-256 0903cd10f7dae731…

MALICIOUS

PDF

45.7 KB Created: 2020-08-31 22:41:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8aa17f2a76307ec69047ce484aa0c135 SHA-1: 4830c706dbe4e9cbd0e0aa13fcd8637b0be84d02 SHA-256: 0903cd10f7dae731f40cb1b738c16efbcd4e5683f1aef0223961b01324b9e349
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.cc/pify?keyword=bass+guitar+tuner+application', is flagged as a malicious redirector. The document body and heuristics indicate a lure related to a 'bass guitar tuner application', suggesting a phishing or scam attempt. The presence of numerous Shopify links, while mostly benign, contributes to a link farm tactic.

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=bass+guitar+tuner+application
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/0928/5024/files/lanolavoxinav.pdf
    • https://cdn.shopify.com/s/files/1/0436/9973/2635/files/rokunawavosozonafigun.pdf
    • https://cdn.shopify.com/s/files/1/0438/2097/4242/files/97969395054.pdf
    • https://cdn.shopify.com/s/files/1/0429/1470/9663/files/37675906083.pdf
    • https://cdn.shopify.com/s/files/1/0437/7165/8389/files/kisifuremativelasozizali.pdf
    • https://cdn.shopify.com/s/files/1/0429/5367/0822/files/cancionero_de_guitarra_rock_nacional.pdf
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/zokijus.pdf
    • https://cdn.shopify.com/s/files/1/0430/8857/6661/files/xofufujatukuwelisaz.pdf
    • https://cdn.shopify.com/s/files/1/0434/6534/3126/files/jajigezuzananowoviture.pdf
    • https://cdn.shopify.com/s/files/1/0435/5925/6232/files/the_demon-_haunted_world.pdf
    • https://cdn.shopify.com/s/files/1/0431/6607/2994/files/bezigobaxerosonapas.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/80804151078.pdf
    • https://static.usrfiles.com/ugd/ce5d00_cd473ce716424be58c20a805ac9400ad.pdf
    • https://static.usrfiles.com/ugd/ac72e0_0408e944a959483782697a6740aad4b1.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_off00007354.bin
e8f3cce46ea6e780dd2f08ad4b78b53b129e7a86ea4823658c7b97dd530f2b38
pdf-font-stream PDF embedded font (sfnt) at offset 0x7354 5148 bytes
font_01_sfnt_off000084eb.bin
1934688398e3a65a84825c8f42744464ef41633c8f5bc9e074a10fca1440c63c
pdf-font-stream PDF embedded font (sfnt) at offset 0x84EB 10676 bytes