Malicious PDF — malware analysis report

Static analysis result for SHA-256 02648de64880d080…

MALICIOUS

PDF

48.6 KB Created: 2020-08-30 12:57:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a7dd30ede0b95d82d15f1de294a6f0b6 SHA-1: 0478d81a9e1034d7ac54633d281eeffc80c12bf7 SHA-256: 02648de64880d080649c4febc881b1cef15a23d08e8a0743f482b8f26aae3814
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to funnel victims to a phishing or malware site. The document also exhibits characteristics of a PDF link farm, with numerous embedded links to external PDFs, suggesting an attempt to manipulate search engine results or distribute content. The ML classifier strongly flagged this PDF as malicious.

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/wix?keyword=feg+hungary+shotguns
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/de65f7_347f4f93d9784387b25c2f98b47df79d.pdf
    • https://static.usrfiles.com/ugd/ec0c41_762d39711e74410ca4391d33cc63da6a.pdf
    • https://static.usrfiles.com/ugd/856cea_ab072de360394046b36d5e525a98f130.pdf
    • https://cdn.shopify.com/s/files/1/0438/3971/7538/files/self_addressed_stamped_envelope_format.pdf
    • https://static.usrfiles.com/ugd/eb6612_32e5f8bbf095427ba19dc87c408081e1.pdf
    • https://static.usrfiles.com/ugd/41f880_4d3da1ac6eda4fcdb08d95382a0e0a5c.pdf
    • https://static.usrfiles.com/ugd/bd5c68_2f2f092fd70643da819f9ec835051b15.pdf
    • https://static.usrfiles.com/ugd/e5cbe5_40f7aecc4e074c2eb92dbfb6d7a999cb.pdf
    • https://static.usrfiles.com/ugd/c836c3_8c647fb2ef7d4713aea8e6139297eee3.pdf
    • https://static.usrfiles.com/ugd/429b25_dead45429c8042558cc0761794ecd675.pdf
    • https://static.usrfiles.com/ugd/b8c837_d4331bf6850348ae97cdea7eee0664fe.pdf
    • https://static.usrfiles.com/ugd/b8c837_b9ae686848544d579930338734846f5d.pdf
    • https://static.usrfiles.com/ugd/ed64d2_f5c2f1ef5c3f4ef3ba5cc42d6ce53c7f.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_off0000826d.bin
c160910524279008206c5ad6b0ace17a20b4d4d15c8657e11279a5fda87f49cd
pdf-font-stream PDF embedded font (sfnt) at offset 0x826D 4972 bytes
font_01_sfnt_off0000935b.bin
ec900f0dc4773187d76e8f730b51f89b2c88c1e0691bff96b855d53fd015a2b3
pdf-font-stream PDF embedded font (sfnt) at offset 0x935B 10080 bytes