Malicious PDF — malware analysis report

Static analysis result for SHA-256 b31e1c1b5d95655a…

MALICIOUS

PDF

36.4 KB Created: 2020-08-07 15:46:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d0f267a891c4f947acdc3a0f0f312421 SHA-1: fa57090d9bfbe586b87ce07395bd3d8f2eb8f16b SHA-256: b31e1c1b5d95655a80113cbb914f730970a8fc3948931d287c93ca6eb6f7c2cf
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link that redirects to malicious infrastructure, disguised as a download for 'Brihaspativar vrat katha pdf download'. This redirection is a common tactic for phishing and malware distribution. The presence of numerous links to external PDFs, many hosted on Shopify, suggests an attempt to create a link farm for SEO manipulation, likely to increase the visibility of the malicious redirector. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=brihaspativar+vrat+katha+pdf+download In PDF document text
    • http://files.sppchurchwelland.com/uploads/1/3/2/7/132740763/genakoneredexetoj.pdfIn PDF document text
    • http://files.solaceinstruments.co.nz/uploads/1/3/0/9/130969576/42677c69.pdfIn PDF document text
    • http://files.warhawkopen.com/uploads/1/3/1/4/131453588/sekezigirejo.pdfIn PDF document text
    • http://remorupo.staffordhockey.org/uploads/1/3/2/8/132815028/fotebit-fifaxuvoba.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/1/0433/4800/0922/files/37495242275.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0825/1288/files/8051535031.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8648/6440/files/xoxodaparikiwexu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4419/8805/files/fefawi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8461/9680/files/38325722501.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7912/2587/files/wow_the_oracles.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8760/9497/files/xafer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9274/5117/files/45881401376.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pawatofamilafal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8991/0167/files/19311053122.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1451/9973/files/47085905424.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2331/9715/files/18431922948.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

Related samples 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005294.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5294 5392 bytes
SHA-256: b7b0837e51858b173167991829d94099525c0a021199f3d73e641c0e191874d7
font_01_sfnt_off000064fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64FD 9332 bytes
SHA-256: 4e0682cfe37d2762040963c3a333fcf844ee25923736dafd785de19e9165b32c

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