Malicious PDF — malware analysis report

Static analysis result for SHA-256 041849173dedafc4…

MALICIOUS

PDF

46.3 KB Created: 2020-08-16 11:59:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 15fc5e5496f3cb39ffe2805dcf09e98f SHA-1: 3814d91f0c2fa6113e0e50a7dad5d48d2630406c SHA-256: 041849173dedafc468eec70949e39fa27267a3a21a4ebb6c0a92a93f4aaa1702
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a redirector link to 'ttraff.ru' which is associated with malicious activity. The document body, though heavily obfuscated, contains text suggesting it is a worksheet, likely a lure. The presence of many external PDF links, some benign and some unknown, further supports the SEO link farm heuristic, indicating an attempt to drive traffic to potentially malicious sites.

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=chapter+2+review+worksheet+physical+science In PDF document text
    • http://files.bethgagliardi.com/uploads/1/3/1/6/131636758/lumusazi.pdfIn PDF document text
    • http://files.keepanopenmind.net/uploads/1/3/0/8/130814642/354913.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/1/0434/2421/9293/files/comunicacion_intercultural_definicion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9544/7970/files/vimipogedazakinovasoda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7387/2807/files/xexokaxekewosepalexarit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4940/9960/files/sasipipofiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8385/8080/files/5249988531.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3173/2125/files/bartolomeu_anania_cartea_deschisa_a_imparatiei.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7054/6335/files/lejemekuwit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2484/9815/files/coriolis_flow_meter_calibration_procedure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7614/8638/files/neopets_the_darkest_faerie.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4024/2840/files/89034026116.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6797/3538/files/convert_corel_to_online.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_off0000738c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x738C 5376 bytes
SHA-256: 3d5d347aeee5ca297ea314bb4b3ae7f39c4280aa74908e8ffa7bc2cafdd0d393
font_01_sfnt_off000085ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85EC 11644 bytes
SHA-256: 154df9222ce5a3ba8ec696f2761bc838526ac2aa714c0bc336faa703275b09b0

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