Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb8821f98fe19edc…

MALICIOUS

PDF

33.3 KB Created: 2020-08-01 08:01:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 382ab8a7d8ec1e21da095d7cc873b485 SHA-1: a34bf044dfabff8b83b880b61ce451e5b2c7b184 SHA-256: bb8821f98fe19edc18f5d50b834d16565ea72b5c5904cb5f8c386b14d66e7e21
194 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised with a keyword related to heavy machinery. The ML classifier strongly indicated maliciousness, and the PDF was found to contain a large number of external links, many hosted on Shopify, suggesting a link farm for SEO manipulation or traffic redirection. The primary malicious URL identified is https://ttraff.ru/pify?keyword=john+deere+250+skid+steer.

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=john+deere+250+skid+steer In PDF document text
    • http://files.fuserealtyhomes.ca/uploads/1/3/0/8/130874582/756032.pdfIn PDF document text
    • http://files.howtomakemerich.com/uploads/1/3/2/3/132303081/mufejegu.pdfIn PDF document text
    • http://files.teamgerbs.com/uploads/1/3/0/9/130969440/8815886.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/1/0432/9019/8180/files/novejavubuwipevelibez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3127/3370/files/pusexakikemoduvovelos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9268/7528/files/lenofanokojojipem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9938/2170/files/66829415162.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61411835552.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0056/0803/files/kutivoxudi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9541/5189/files/how_do_ions_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4460/9943/files/50335121089.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lufixupiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4183/2615/files/8793290886.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2385/7824/files/sixowuvewogarinosobasir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9051/7911/files/55031165013.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000046a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x46A7 5124 bytes
SHA-256: 782d874e19ba7d8b830c64df657cef6a0faeb5f615fd39465c388ed2a79b8a73
font_01_sfnt_off0000580b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x580B 9524 bytes
SHA-256: 328aa8053326aea3bfa4aae5461bddbb80871a1d32713b9c3a206b3c380d8cb0

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