Malicious PDF — malware analysis report

Static analysis result for SHA-256 81417ed16a638f0f…

MALICIOUS

PDF

48.6 KB Created: 2020-08-12 15:00:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6170cce7698d5c219ef55f71421861e2 SHA-1: fbc8180de19596934d2e56922256c662c0328c0b SHA-256: 81417ed16a638f0fdbbc18735e99d83108e8231d9d5ca8fca06115fb9e7ec848
194 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, many of which point to a redirector service (ttraff.ru) known for malicious activity. The document body, though heavily obfuscated, appears to contain the same URL. The presence of a link farm and a redirector suggests an attempt to drive traffic to malicious sites, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=lonely+shepherd+flute+and+piano+pdf In PDF document text
    • http://mofara.j2theson.com/uploads/1/3/0/7/130775732/lanukerebikami.pdfIn PDF document text
    • http://nusuwaxid.cowboycollars.com/uploads/1/3/1/8/131856190/122258d.pdfIn PDF document text
    • http://muziva.inscience242.com/uploads/1/3/1/3/131398591/9535620.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/1/0440/1030/7749/files/tesip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7761/5262/files/digging_the_africanist_presence_in_american_performance.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0569/6407/files/50391368702.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0803/2922/files/abba_dancing_queen_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8741/3923/files/33553852206.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9883/8942/files/27054514587.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/9310/2493/files/2d_seismic_survey_design.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0593/4757/files/wexijumujod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/duzawubemamomavokam.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004798.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4798 5056 bytes
SHA-256: b1a45f823751a2bc88e0c74d52aab7234278f0fe3561d8631987fb3134ecc288
font_01_sfnt_off000058b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58B8 4764 bytes
SHA-256: f687059d9f97323c488f2d34404eaff146065cac07c53f42cb9658c285ad1519
font_02_sfnt_off00006a26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A26 10752 bytes
SHA-256: 2cad3a3031c95b3c9ca142d4d66f3c8f001861e02dd7e35332f4f1fe1829ea18
font_03_sfnt_off00008f2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F2E 16808 bytes
SHA-256: d8c82769ad1a82fc58dc03697d83e6786824c0492554dbc048bb50e8e1d59ba3
font_04_sfnt_off0000a68c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA68C 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361