Malicious PDF — malware analysis report

Static analysis result for SHA-256 341219ac60d4928f…

MALICIOUS

PDF

41.8 KB Created: 2020-09-13 09:50:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab9f2059d804efb52dc806f934f6e250 SHA-1: ee43988211f9bb38d08d008d9814087a2ead00bd SHA-256: 341219ac60d4928f456c7b2cd465465bd4132870fcc0dec60be086b21afbe158
154 Risk Score

Malware Insights

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

This PDF document contains a link farm, with one primary link redirecting to malicious infrastructure. The embedded link is disguised as a search result for 'us bunting club lowell ma'. The document's structure and embedded links suggest it is part of a link farm or SEO manipulation scheme designed to drive traffic to malicious sites. No scripts were extracted, but the presence of a malicious redirector and numerous external links indicates a high likelihood of user redirection to harmful content.

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.club/wix?keyword=us+bunting+club+lowell+ma
    • http://files.tomgauthier.com/uploads/1/3/0/7/130776730/24eea599d1821.pdf
    • http://files.varietymesh.com/uploads/1/3/1/6/131606198/547a6637.pdf
    • http://files.eespip.eu/uploads/1/3/0/7/130775516/2378f.pdf
    • http://files.onstedkiwanis.org/uploads/1/3/0/7/130775974/zozepolavupalav_pafewigilekis.pdf
    • http://files.prek-12resources.com/uploads/1/3/1/6/131606118/xerekekeje_gezos.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/1602/8309/files/bilulofadobinefikozazivok.pdf
    • https://cdn.shopify.com/s/files/1/0462/9161/5905/files/beholder_2_gog.pdf
    • https://cdn.shopify.com/s/files/1/0431/1724/8673/files/24675061694.pdf
    • https://cdn.shopify.com/s/files/1/0436/1850/0765/files/ways_of_the_world_textbook_chapter_8.pdf
    • https://static.usrfiles.com/ugd/229b11_48d0e4888d4a4e908a867b068ce27515.pdf
    • https://static.usrfiles.com/ugd/cafc24_3ab98c808fc24a0b9ed1c9c52dcc37a0.pdf
    • https://static.usrfiles.com/ugd/b1dabf_2b7ddc2d99884deb831ad4615d51ac96.pdf
    • https://static.usrfiles.com/ugd/3cb679_e39ae075c9844983a3aec7eb8d91500b.pdf
    • https://static.usrfiles.com/ugd/b96e41_e3189f335321452cb933debad000a3ef.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_off00005bcb.bin
104a6cdd321a69e5b5fda0a57e122449cfb29bc37900219b92d1f920b35abdaa
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BCB 5248 bytes
font_01_sfnt_off00006dad.bin
69296c0b144b285f90fcfb32a4500b1361a7a1a1254669440597b604f4465950
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DAD 14584 bytes