Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e1bbd1b3d66a42b…

MALICIOUS

PDF

41.5 KB Created: 2020-08-01 06:12:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0e1d90347b75587597e31a29a8158fe SHA-1: 90b03961857972196bb7d50e859606665e127214 SHA-256: 7e1bbd1b3d66a42b38e452a5a7a9bad1c73337021336444978b627d17017d9b8
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains a reference to 'Valve corporation video games' and a URL pointing to a redirector. The PDF also hosts a large number of external links, suggesting a link farm or SEO poisoning attempt. No scripts were extracted, but the presence of embedded URLs and the malicious redirector link strongly suggest an attempt to lead the user to a malicious site.

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.ru/pify?keyword=valve+corporation+video+games
    • http://files.wombwelldcs.com/uploads/1/3/0/7/130775876/xapigi.pdf
    • http://files.meridithrohana.com/uploads/1/3/1/4/131406403/97a9855d52501b.pdf
    • http://files.artbymadelinesmith.com/uploads/1/3/1/4/131437593/jegij.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/1303/6439/files/nijinedegifivog.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/66656561998.pdf
    • https://cdn.shopify.com/s/files/1/0435/7767/1843/files/61894507555.pdf
    • https://cdn.shopify.com/s/files/1/0430/4614/2106/files/pthon_use_remainder_to_find_date.pdf
    • https://cdn.shopify.com/s/files/1/0437/8699/3816/files/d_d_5e_charm_person.pdf
    • https://cdn.shopify.com/s/files/1/0431/1059/6765/files/15347911598.pdf
    • https://cdn.shopify.com/s/files/1/0427/8448/9631/files/xejolosakubo.pdf
    • https://cdn.shopify.com/s/files/1/0438/1707/4850/files/fafomefejulunijinabenep.pdf
    • https://cdn.shopify.com/s/files/1/0436/0211/6772/files/47558951962.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/29883534071.pdf
    • https://cdn.shopify.com/s/files/1/0432/3514/7933/files/15339194204.pdf
    • https://cdn.shopify.com/s/files/1/0434/4234/0007/files/51513931335.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_off00006445.bin
4fce2d83e68d7f5c52c394dec2949ee0b12add2d200b1e26ea6076127cb4a5df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6445 5420 bytes
font_01_sfnt_off000076a5.bin
7abf14e9ca7b11b204a2ad4ceb9840a1404502eb5f5a7ab021895ed5350324dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76A5 10228 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.