Malicious PDF — malware analysis report

Static analysis result for SHA-256 984f71e3fcb9155a…

MALICIOUS

PDF

58.4 KB Created: 2020-08-11 14:58:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b217dbf45ddbe48b99a6fd0018eb5af0 SHA-1: 3123ad427c188f4d7668d6e4747750baf5272136 SHA-256: 984f71e3fcb9155a83c3be6a0264434fcf216967a2e6ee52533f20fc71dc3383
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. This URL is embedded within the document's body, disguised as a research methodology PDF. The presence of numerous other external PDF links suggests a link farm or SEO poisoning attempt to drive traffic to malicious sites. 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/wb?keyword=libro%20sampieri%20metodologia%20de%20la%20investigacion%20pdf In PDF document text
    • http://files.offthehookmarinefish.com/uploads/1/3/0/7/130740573/8f720c81e7b.pdfIn PDF document text
    • http://files.vagabonder.org/uploads/1/3/1/1/131164569/datowukepaxa.pdfIn PDF document text
    • http://files.anatomy-demystified.com/uploads/1/3/2/6/132696414/witeperagu.pdfIn PDF document text
    • http://kuvujode.christinemcahill.com/uploads/1/3/2/6/132696030/zelalefiwu.pdfIn PDF document text
    • http://rimupuk.feralaffairs.org/uploads/1/3/0/7/130738731/20c9801.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/1/0440/5726/4280/files/50027105239.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9613/8137/files/jifimebefadigal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1717/3149/files/10418877200.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6135/4389/files/53227060555.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8714/2818/files/42113320689.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/7141/8018/files/koguxevazowoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1540/4695/files/72208194022.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1769/9477/files/80147050212.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3461/5708/files/zofuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8679/1334/files/ine_ccie_sp_v4_workbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0964/5478/files/vomosutatetujugumavapezid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6925/7366/files/tuxumikoro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/8127/4278/files/cambridge_checkpoint_mathematics_practice_book_7.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_off0000a128.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA128 5616 bytes
SHA-256: 1ff06eb8b327b29962874d969554db703d95b625efd59eae00fbc78701805251
font_01_sfnt_off0000b429.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB429 11728 bytes
SHA-256: 3ae65830a0f07b0fb216fac56c0a9d5236405d72f1e61558116a99b3361331e3

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