Malicious PDF — malware analysis report

Static analysis result for SHA-256 79867e70dcddbb65…

MALICIOUS

PDF

49.1 KB Created: 2020-08-09 18:52:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a7228c56cd88d1ccfe5931c968449ca9 SHA-1: 4889e2eaa4e1dd9ea7d040a77651ff9b012f4104 SHA-256: 79867e70dcddbb6526bcbb00bfea2b8f2d16ff3ec99fd2511d10cd6a0bda7418
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external resources, many of which are hosted on Shopify and appear to be part of an SEO link farm designed to drive traffic to a redirector. The primary redirector URL, 'https://ttraff.ru/pify?keyword=birthday+invitation+letter+format+pdf', is flagged as malicious. This suggests a phishing or scam campaign using a lure of a birthday invitation to entice clicks 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=birthday+invitation+letter+format+pdf In PDF document text
    • http://tadik.retrohacks.net/uploads/1/3/1/0/131069839/bijoras_deketid_xovizefuvadet.pdfIn PDF document text
    • http://files.buildhealthyseniors.com/uploads/1/3/0/8/130813988/67c91d4d2.pdfIn PDF document text
    • http://files.visitsmithcountyms.org/uploads/1/3/2/6/132682883/c01545f011.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8452/9310/files/gisuzafujugokapezivobeba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7513/3859/files/food_sensory_evaluation_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3907/2161/files/repupotujexututidesuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1123/4199/files/list_of_20_amino_acids.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0172/4580/files/carcinoma_papilifero_tireoide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7704/1304/files/71721961168.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2199/1079/files/govozox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1022/0447/files/54014795371.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9236/8798/files/laluvalidowut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8339/9329/files/bedupefora.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4351/1706/files/wekozikexapefipibexi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8846/9398/files/65999744833.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 7

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69F1 5104 bytes
SHA-256: 443141fdde7f89ff12a617e9884266c650a01c215a0d98ede1a7ca413438cbde
font_01_sfnt_off00007b27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B27 14640 bytes
SHA-256: 9fa9936a2b8ef6a66047bf8b450d6e7d5e295881f3e282d190363eb29f259949
font_02_sfnt_off0000a91e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA91E 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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