Malicious PDF — malware analysis report

Static analysis result for SHA-256 7042603afca94faf…

MALICIOUS

PDF

44.2 KB Created: 2020-08-05 04:49:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f86829720ae6c404638c5bbabbce6b33 SHA-1: bca829d2d9c53f93dcd765f513dbb8999ba0af1e SHA-256: 7042603afca94faff63f6cb9a1e6cbb1199f42c9de1382cb8568383e54ffd180
154 Risk Score

Malware Insights

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

This PDF document contains numerous links, including one pointing to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, contains text suggesting a lure related to 'mathematical modelling basics pdf'. The presence of many external PDF links indicates a link farm or SEO poisoning attempt, likely to drive traffic to malicious sites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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=mathematical+modelling+basics+pdf
    • http://files.afcitypark.com/uploads/1/3/1/8/131871405/sajatalepekega_rulipi_musaselupoware_denipuxegi.pdf
    • http://files.laurelwoodtroy.com/uploads/1/3/1/3/131379874/88109e7c.pdf
    • http://files.rickyfrank.com/uploads/1/3/2/7/132712207/5656922.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/5086/6590/files/xetemixevim.pdf
    • https://cdn.shopify.com/s/files/1/0430/2992/1943/files/jolorifixumopixirabinipi.pdf
    • https://cdn.shopify.com/s/files/1/0436/4589/4816/files/47883839778.pdf
    • https://cdn.shopify.com/s/files/1/0428/9485/2252/files/bamuluge.pdf
    • https://cdn.shopify.com/s/files/1/0429/9656/4131/files/renumokuvan.pdf
    • https://cdn.shopify.com/s/files/1/0436/3576/9497/files/96019652826.pdf
    • https://cdn.shopify.com/s/files/1/0431/2802/9345/files/10317610099.pdf
    • https://cdn.shopify.com/s/files/1/0430/0508/3811/files/novovodunugek.pdf
    • https://cdn.shopify.com/s/files/1/0431/0643/5232/files/38853887126.pdf
    • https://cdn.shopify.com/s/files/1/0433/7421/5331/files/79877256271.pdf
    • https://cdn.shopify.com/s/files/1/0433/3695/8106/files/sisopinumigo.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_off00006f01.bin
7d50d2f74c72a9ccf915a21ebccd587458983442d262ef91ab5896de87f8e083
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F01 5616 bytes
font_01_sfnt_off000081ff.bin
e4f503916eeae6bd7d186d9978c94cb7d16061fa5310fd5bc0fb269be47bcae6
pdf-font-stream PDF embedded font (sfnt) at offset 0x81FF 9896 bytes