Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef3ea991ce625582…

MALICIOUS

PDF

40.8 KB Created: 2020-08-06 18:28:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b4714c5fa46355b187e6f2d813029095 SHA-1: 843a5b6b924fba7bd988badb17701120eb06266e SHA-256: ef3ea991ce625582437e621457bae6366031a259f62d3763a62e11ac21afbd12
202 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits a PDF link farm heuristic, with numerous links hosted on 'cdn.shopify.com' and other domains, suggesting an attempt to distribute or mask malicious content. The document body, though partially corrupted, contains the same malicious URL and a call-to-action phrase, reinforcing the lure to download content. The primary malicious URL is 'https://ttraff.com/pify?keyword=twilight+the+graphic+novel+volume+1+pdf+download'.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=twilight+the+graphic+novel+volume+1+pdf+download In PDF document text
    • http://files.thrivingdrs.com/uploads/1/3/1/3/131380745/00ccec.pdfIn PDF document text
    • http://files.stoewer-cars.com/uploads/1/3/1/4/131408942/laxejoko.pdfIn PDF document text
    • http://files.barnsofsummerscounty.com/uploads/1/3/1/4/131437753/f93fb8.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/1/0437/3889/0394/files/electric_guitar_vst_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5802/0004/files/jegiziw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7494/4153/files/sotunakamoseg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9099/2549/files/27208541685.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8315/9969/files/functional_foods_review.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6421/4182/files/mapoges.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2308/8290/files/87128814475.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4385/5258/files/52994049596.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4953/9989/files/26933722206.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2784/0669/files/nikosagikexofe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8082/7558/files/lifugagowuvavap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0671/2219/files/91194240731.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9941/3921/files/vios_l2-_adventerprisek9-_m._03._2017._qcow2_download.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
🗂 Part of campaign: coventrypl.org 3 samples

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60E8 5544 bytes
SHA-256: c02b779b706c80369bb1a72770f3d7a91a76aa020f15e73d2170dd7f132c0b95
font_01_sfnt_off000073bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73BC 10016 bytes
SHA-256: 240d1213a0136541c027f4e6813b818e333a7d028791e7eb6d26a2849a1743b9