Malicious PDF — malware analysis report

Static analysis result for SHA-256 b43f91e16cd38791…

MALICIOUS

PDF

41.7 KB Created: 2020-08-20 02:04:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a08b2e1f1f148f8cc43c2858b949ec15 SHA-1: df38a2ff3d4ffb8ac1c9ac8b70268212fb1c0467 SHA-256: b43f91e16cd38791a5bed549389faae4f8d2716b1b7f7ff385b098b6d0217865
194 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm or SEO manipulation, with numerous embedded links to external PDF documents. One of these links, 'https://ttraff.com/pify?keyword=sharah+qasida+burda+pdf', is identified as a known malicious redirector. The ML classifier also flagged this PDF with high confidence. The presence of a malicious redirector suggests an attempt to lure users to malicious content, potentially for phishing or malware distribution.

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.com/pify?keyword=sharah+qasida+burda+pdf In PDF document text
    • http://files.northwoodsares94.com/uploads/1/3/1/3/131379639/5224814.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/1/0428/5058/2684/files/arduino_due_user_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6124/0220/files/42214013376.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2027/1259/files/96197089553.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1829/7245/files/54541704743.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/8833338052.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9963/4326/files/35945681214.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6942/1206/files/fuxozetipijofo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9503/8877/files/53749985742.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 2

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_off00005867.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5867 5464 bytes
SHA-256: 183904873597361339c2b5736d6b6b2caeaba0a73e75c27042d28667e8794573
font_01_sfnt_off00006ae9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AE9 14432 bytes
SHA-256: 086027821d9e5199fcefe550c3461f19d83984661c9290826567435bc59827cd

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