Malicious PDF — malware analysis report

Static analysis result for SHA-256 7331d6a1e0efbd9a…

MALICIOUS

PDF

118.7 KB Created: 2020-08-20 06:07:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad8953536ff42bf948b43e79cd578061 SHA-1: 140f68c210f3ea0cc3c73a493acf6122102075f0 SHA-256: 7331d6a1e0efbd9a62f34fc7bf61bb0e78672571ad011d995d52dd70533d718b
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting an attempt to manipulate search results or distribute further malicious content. The ML classifier also strongly flagged this PDF as malicious. While no scripts were directly extracted, the presence of embedded URLs and the nature of the heuristics point towards a phishing or content-distribution attack vector.

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=ideological+state+apparatuses+are+nonviolent+social+formations
    • http://rumin.shootmephotographyy.com/uploads/1/3/0/7/130775934/kopijemikiva.pdf
    • http://files.aubreesbullmastiffs.com/uploads/1/3/1/8/131871424/8166800.pdf
    • http://files.johnathancockrell.com/uploads/1/3/1/4/131410234/tuduzitedufufa.pdf
    • http://files.shuntersmith.com/uploads/1/3/2/7/132740805/a80fbeb81461be.pdf
    • http://files.dlvn.org/uploads/1/3/0/9/130969150/wobamuzudobopejo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/7912/2587/files/manual_trash_compactor.pdf
    • https://cdn.shopify.com/s/files/1/0435/2779/8944/files/xakonuvifexuvuxa.pdf
    • https://cdn.shopify.com/s/files/1/0436/9612/8153/files/fikefevinokijofowudi.pdf
    • https://cdn.shopify.com/s/files/1/0431/9058/3458/files/99280739236.pdf
    • https://cdn.shopify.com/s/files/1/0431/9176/3105/files/english_to_bangla_word_list.pdf
    • https://cdn.shopify.com/s/files/1/0433/9341/7383/files/rizutebujodukuzos.pdf
    • https://cdn.shopify.com/s/files/1/0433/1739/5611/files/44842514477.pdf
    • https://cdn.shopify.com/s/files/1/0438/5076/0357/files/ansible_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0448/7512/0807/files/anti_aliasing_in_computer_graphics.pdf
    • https://cdn.shopify.com/s/files/1/0428/9314/8313/files/6969186570.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_off000195ef.bin
9ed1692eca4b05a1789286be4691419ac803f90ff504838afc779ca948f7553b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x195EF 5472 bytes
font_01_sfnt_off0001a87a.bin
f15d87a906581176bc6447be0f5d4ecbd558568a385fb64d210485734b815600		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A87A 10600 bytes

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