Malicious PDF — malware analysis report

Static analysis result for SHA-256 19a2fd20198338ad…

MALICIOUS

PDF

42.2 KB Created: 2020-08-12 19:20:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba6fc57b54998d9741cb24a37ffbfbcc SHA-1: 88b3e4d739d196ae6f0ca72a5aed85a02fd44625 SHA-256: 19a2fd20198338adf7efb24702fae671e3cdbd62c645d11bfe666647b3f17354
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm designed to manipulate search engine results. One prominent link, 'https://ttraff.ru/pify?keyword=bowditch+pdf+download', is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to drive traffic to malicious infrastructure. No scripts were extracted, but the PDF structure and embedded links strongly indicate a phishing or malicious redirection attempt.

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=bowditch+pdf+download
    • http://fapak.gabrieliqbal.com/uploads/1/3/1/8/131855997/3108598.pdf
    • http://dawese.mariacristinajadick.com/uploads/1/3/1/1/131164250/fozaxebiwemupotaz.pdf
    • http://files.brothersphotographers.com/uploads/1/3/2/7/132740485/waxawi.pdf
    • http://files.artofmichaelnguillen.com/uploads/1/3/0/9/130969811/42f9f.pdf
    • http://files.barrysutvadventures.com/uploads/1/3/0/8/130874110/rovovotiri.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/9005/9157/files/najugal.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51220099535.pdf
    • https://cdn.shopify.com/s/files/1/0432/6329/5654/files/48640606265.pdf
    • https://cdn.shopify.com/s/files/1/0435/2396/5079/files/60801079628.pdf
    • https://cdn.shopify.com/s/files/1/0432/6716/2276/files/86065618362.pdf
    • https://cdn.shopify.com/s/files/1/0430/5184/3737/files/2020_accp_guidelines_for_antithrombotic_therapy.pdf
    • https://cdn.shopify.com/s/files/1/0427/4742/9031/files/tuvali.pdf
    • https://cdn.shopify.com/s/files/1/0436/0772/0093/files/javexutonipexaravisinajox.pdf
    • https://cdn.shopify.com/s/files/1/0434/2392/4376/files/rabapuw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/koxumugude.pdf
    • https://cdn.shopify.com/s/files/1/0434/5731/4977/files/67215370590.pdf
    • https://cdn.shopify.com/s/files/1/0430/6698/2561/files/shirt_sewing_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0430/7343/7847/files/64334538911.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_off000067d6.bin
1d3490df42854d2d5444fbd9aa357e6ae0c8d37ddf0d03d9d3098113e431cc9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67D6 5112 bytes
font_01_sfnt_off0000794f.bin
e613fa59d453d714ca085761fe140fb23542653e33e4502d8738c7004c2545e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x794F 10100 bytes

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