Malicious PDF — malware analysis report

Static analysis result for SHA-256 c41dff9f4a73cd1b…

MALICIOUS

PDF

34.7 KB Created: 2020-08-18 19:00:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5ec64ebe33f886a290b1693d0a2d81e0 SHA-1: a84b60ce3def359cc812a06f95bbec89e03fcfac SHA-256: c41dff9f4a73cd1bcb088ec3cc2ba2c599e5163bd7db71513c9fa402e3367006
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a heuristic identifying it as a PDF SEO link farm. One of the primary links directs to a known malicious redirector service, ttraff.cc, which is likely used to obscure the final destination of the malicious content. The presence of numerous links suggests a broad distribution attempt, characteristic of phishing or scam campaigns.

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.cc/pify?keyword=abp+electronics+full+form In PDF document text
    • http://files.alainolivier.ca/uploads/1/3/1/8/131856398/rugobumoroj_women_nofajufajomad_fomimom.pdfIn PDF document text
    • http://demal.stensolo.com/uploads/1/3/1/8/131857334/a54682e6de.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/1/0431/8907/6117/files/foranofidurisasabimepa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2207/2480/files/club_car_wiring_diagram_36_volt.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0011/1009/files/60899756863.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0473/8206/files/digestive_system_worksheet_grade_8.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7492/0347/files/fegopisalikadol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/0813/4053/files/types_of_bitumen_used_for_road_construction.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1935/3767/files/urllib2_vs_urllib3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8640/5029/files/elementary_statistics_larson.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6934/9794/files/nowajipamimebiligijimuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7008/7587/files/fudib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0868/7269/files/pewepivopaxuru.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_off00004ac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4AC1 5080 bytes
SHA-256: 2dbb07a6e667d1d70cf96724c47cb0ed0d76cb8752f1b43ddfa06c6187c8db42
font_01_sfnt_off00005beb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BEB 10192 bytes
SHA-256: e4f0604c7aeb40293338176f3f2a086ec7f549d342d084084c10f16bcbc4d8fc

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