Malicious PDF — malware analysis report

Static analysis result for SHA-256 68e8511720caf633…

MALICIOUS

PDF

41.7 KB Created: 2020-08-08 16:30:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: b844fed562b9b63ef1b657e2d1de845b SHA-1: 2296f1e8bf566baab60367c453afc353294fcb57 SHA-256: 68e8511720caf633f341d0db0e47fbe193684c249a75e343313fb532a79ad609
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying one as a malicious redirector. The document body, though partially corrupted, includes the URL 'https://ttraff.com/pify?keyword=prevencion+de+accidentes+de+trabajo+pdf', suggesting a lure related to workplace accident prevention. The presence of a large number of external PDF links, many pointing to Shopify domains, indicates a potential SEO poisoning or link farm tactic to distribute malicious 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.com/pify?keyword=prevencion+de+accidentes+de+trabajo+pdf In PDF document text
    • http://files.ratcotu.org/uploads/1/3/2/6/132695719/87807f87f3eb.pdfIn PDF document text
    • http://files.angelicinfusionart.com/uploads/1/3/1/8/131871467/fekugivetuxude.pdfIn PDF document text
    • http://files.mesillavalleyfinearts.com/uploads/1/3/0/7/130776656/gufatatudubuwasu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1720/7971/files/nasomulirolinonilogi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3856/2712/files/22800322259.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lorirazapevimixawas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9762/9596/files/nabagimelugop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1559/4393/files/36920973212.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5314/6517/files/anatomy_for_sculptors_understanding_the_human_figure_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6633/6166/files/6763597503.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1748/7011/files/19735469923.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2484/0861/files/97394198661.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8942/0695/files/pagubaropomapopozigegenup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5546/4104/files/kevegoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0744/3103/files/32076883432.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006081.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6081 5396 bytes
SHA-256: adda4cd58b232abc856445ffc7290f779925df1c561e9e6a906a6a3394195254
font_01_sfnt_off000072ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72ED 11436 bytes
SHA-256: 8b36b42dd6d7d60fe0e4f38335c7e03da98eabe4352da4601f88dc4684b21f70

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