Malicious PDF — malware analysis report

Static analysis result for SHA-256 b73343492872610c…

MALICIOUS

PDF

44.9 KB Created: 2020-08-21 11:14:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e41dfe262a3b10facf1cfa7a85b773b2 SHA-1: 5978fa368a3f0be659465ff7623271f7cfc3f792 SHA-256: b73343492872610c922a60fefba2680d7fd9ffcef88fd51d0fb89c4b72bbdfb5
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, a common tactic for SEO poisoning and redirecting users to malicious sites. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags a link to traff.ru, which is known malicious infrastructure. The document body, though heavily obfuscated, contains the URL that likely serves as the lure. The ML classifier also strongly indicated maliciousness.

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=intermolecular+forces+activity+worksheet+answers In PDF document text
    • http://pomik.thespicycowgirl.com/uploads/1/3/2/8/132814940/9b6f618.pdfIn PDF document text
    • http://files.sl-ltd.com/uploads/1/3/1/6/131636891/teboxu_rutasexoxenevit.pdfIn PDF document text
    • http://vevolo.sdaspay.com/uploads/1/3/1/3/131382406/8480304.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/1/0434/6200/0806/files/xovexafilub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8651/0232/files/weroxujowawejenoporuligo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6078/8390/files/the_data_warehouse_etl_toolkit_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5213/0716/files/96098083349.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0510/8636/files/51119708168.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9165/6864/files/sixth_grade_math_test.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5503/6054/files/functional_foods_definition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9009713252.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/9626/4094/files/graphic_design_books_for_beginners_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4179/0871/files/connectors_in_english_grammar_exercises_with_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8995/9839/files/kilowowovovovadasagut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3049/4878/files/nadopowuxomeworulev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4595/2408/files/58682290206.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 3

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_off0000705c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x705C 5376 bytes
SHA-256: 3dde34a53818b293e39bf69a65191436462239e3a175f824ea2c460551c15e96
font_01_sfnt_off0000828e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x828E 10364 bytes
SHA-256: b9b39958b2a6f9f65680b61a719702dac5e84554b6afb93f96fb3ab2c28f44c1

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