Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e554cdcb3e57f5c…

MALICIOUS

PDF

44.8 KB Created: 2020-08-21 00:58:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d23b0f4570923a4e4551827c9b2bf0fd SHA-1: ff561c2356eee3fd71ab56a37dd0021cdf97a876 SHA-256: 9e554cdcb3e57f5c481092d11a088d375f49c89377e8f4f56ae143c6d5872891
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic identifying a redirector link to 'ttraff.ru'. This suggests the document's primary purpose is to lure users to malicious sites. The ML classifier strongly supports the malicious nature of this PDF, and the presence of a link farm further indicates a malicious intent to distribute content or redirect traffic.

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=best+catalogue+design+pdf
    • http://files.northernillinoispainting.com/uploads/1/3/0/8/130814308/viwiwevamod_kawomudijuki.pdf
    • http://nonex.rosinakhan.com/uploads/1/3/1/4/131438044/4351726.pdf
    • http://zobas.tarahanish.com/uploads/1/3/0/7/130740206/0e63798e670.pdf
    • http://files.chrisgriffithdesigns.com/uploads/1/3/2/6/132682820/tojenunigusugom.pdf
    • https://cdn.shopify.com/s/files/1/0433/1234/9334/files/26313893751.pdf
    • https://cdn.shopify.com/s/files/1/0435/0600/8216/files/lowercase_cursive_writing_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0432/5448/1056/files/wuzinulisekagimig.pdf
    • https://cdn.shopify.com/s/files/1/0438/4145/4240/files/sigora.pdf
    • https://cdn.shopify.com/s/files/1/0433/4141/4552/files/38181991382.pdf
    • https://cdn.shopify.com/s/files/1/0435/5650/3704/files/anemia_ferropenica_en_nios_peru.pdf
    • https://cdn.shopify.com/s/files/1/0429/9869/4042/files/linfoma_de_burkitt_en_nios.pdf
    • https://cdn.shopify.com/s/files/1/0429/6838/3642/files/suxupapitav.pdf
    • https://cdn.shopify.com/s/files/1/0434/9765/2376/files/devenir_famille_d_accueil_chien_guide.pdf
    • https://cdn.shopify.com/s/files/1/0439/3933/2251/files/8158242724.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000071a1.bin
82070bf0a408cc189552798dfe747543902ab83317ffaf79b18111f417256e72
pdf-font-stream PDF embedded font (sfnt) at offset 0x71A1 5276 bytes
font_01_sfnt_off000083aa.bin
7f6bc00f8061632dfc89d6485ffe68998e052ebe9a4552a18cbcec2bf71dc80a
pdf-font-stream PDF embedded font (sfnt) at offset 0x83AA 10288 bytes