Malicious PDF — malware analysis report

Static analysis result for SHA-256 bff0645d3802d143…

MALICIOUS

PDF

40.4 KB Created: 2020-08-23 23:31:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 773493488ea482e7ec2fc4fc53e3dff7 SHA-1: 4fbd23fbe5a98cecb5ebd1e10e0e04c23a42b101 SHA-256: bff0645d3802d14340e6d7089ddf86f1024f106bfa9bf5e5948ab99ff626152f
194 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One prominent link, 'https://ttraff.ru/pify?keyword=adverbs+worksheet+for+class+3+pdf', is identified as a malicious redirector. The document body, though partially corrupted, suggests a lure related to an 'adverbs worksheet for class 3 pdf'. This indicates a social engineering attack aiming to redirect users to malicious infrastructure.

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=adverbs+worksheet+for+class+3+pdf In PDF document text
    • http://deweduneg.loopingtheloopfestival.org.uk/uploads/1/3/1/4/131406686/rerasimu.pdfIn PDF document text
    • http://files.curetypeone.com/uploads/1/3/1/3/131380121/dadf492e7ec13e.pdfIn PDF document text
    • http://vozofenap.yogawasi.com/uploads/1/3/1/3/131384403/romufude_nudasek_fekeluwuwugu_ropipasinag.pdfIn PDF document text
    • http://files.barbaralyons.net/uploads/1/3/1/1/131164114/7040810.pdfIn PDF document text
    • http://sivebar.felixjarrarmusic.com/uploads/1/3/0/9/130969742/ninevelule.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/1/0435/4480/5525/files/fubejojop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3779/4204/files/655610115.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6887/5157/files/23895277153.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/0718/4793/files/favivesotuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9432/6949/files/95240390688.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1992/7713/files/zaserona.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1870/6331/files/functional_analysis_mdu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8017/9100/files/vidoxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6574/5314/files/tascam_dp-_006_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6472/9512/files/15612465766.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3331/3958/files/reporter_definition_government.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 8

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_off00005f0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F0D 5752 bytes
SHA-256: 305ff27c3b735f7740b3d3989386fb8ae84f0ac0010d23d251851dbd9217633e
font_01_sfnt_off000072ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72AD 10008 bytes
SHA-256: dc3d4c3c99cbed375f5964b16c0f443c34e4a1e9c20bb6d91c6315d4e6a69ffb

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