Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3d4acd3e6584103…

MALICIOUS

PDF

55.6 KB Created: 2020-08-11 02:28:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 733ebd6ad734a01d3d3ae5c827c46ddc SHA-1: 95677c88f0e54152902bafc83294d96ded8526d8 SHA-256: c3d4acd3e658410370f41257f2fde3405e32af1716589a87ea241f3c27211dd1
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-Always T1059.001 PowerShell

The PDF contains numerous links, with one critical heuristic identifying it as a malicious redirector. The document body, though heavily obfuscated, contains the URL https://ttraff.com/pify?keyword=basic+strength+of+materials+interview+questions+pdf, which is also flagged as a malicious redirector. This suggests the document's primary purpose is to lure users to click on this link, likely leading to a malicious site or further download. No scripts were extracted from this sample.

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.com/pify?keyword=basic+strength+of+materials+interview+questions+pdf In PDF document text
    • http://files.festivalrun.com/uploads/1/3/1/4/131438418/durisali.pdfIn PDF document text
    • http://wijar.carolynskei.com/uploads/1/3/2/6/132682883/5637602.pdfIn PDF document text
    • http://gizof.brownfieldmaine.org/uploads/1/3/1/4/131453060/431b2353e3.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/1/0429/1880/5657/files/islamic_art_geometric_design.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5580/7654/files/xikadinadenu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/tixunozesapifad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9083/6632/files/74909552138.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6909/5590/files/badminton_court_size_in_meter.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4173/4301/files/85115846818.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6585/1560/files/26005075950.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3488/5796/files/simplest_form_definition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vidabuvuwegorowomilamum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/0230/1349/files/spiritual_warfare_bible_study_guides.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7680/5018/files/12970728399.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3646/5559/files/angular_tutorial_for_beginners.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2991/1957/files/bafg_berlin_formblatt_3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2986/3320/files/bhagavad_gita_story_in_malayalam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7752/4888/files/9439354304.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009185.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9185 5896 bytes
SHA-256: 14d324c889c6950b7a57c1fcf9e231ece367ee08fed24c4321b744204b074c0c
font_01_sfnt_off0000a56d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA56D 13404 bytes
SHA-256: 02996ee900d133a8bd080c70585a62c142e35deefc6ba198933f96694e1ac0e0