Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf1ea7252f6640c1…

MALICIOUS

PDF

52.2 KB Created: 2020-08-16 22:55:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b8b6bf9f5b3d9b592e30af6df71b3b65 SHA-1: 7063d3e6f84bdb1816380f5ef2a21cdd5edc948c SHA-256: bf1ea7252f6640c107e4af04de62f8924799a96752146d855a05df64d49adc63
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.com) known for malicious activity. The ML classifier also strongly indicated maliciousness. The document body appears to be obfuscated or corrupted, but the presence of the malicious redirector URL is the primary indicator of compromise. The embedded links likely serve as a link farm to distribute traffic and potentially evade detection.

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=asagao+to+kase-+san+batch In PDF document text
    • http://files.triokhnopff.com/uploads/1/3/0/9/130969075/4801465.pdfIn PDF document text
    • http://zapaze.bloom4wellness.com/uploads/1/3/1/3/131383407/6730112.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/1/0428/4160/4263/files/sobisalezewiromarapenosar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8176/7848/files/wimobinejeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2087/6962/files/lerotevanimirosake.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3993/2064/files/1440149304.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2218/6656/files/residential_building_plans_with_dimensions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6078/1465/files/atlantis_big_fish_games_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9045/0334/files/28888211226.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jepomosojavadoji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0849/1673/files/boating_exam_questions_and_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tovetutokukike.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3768/7962/files/sudaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1319/2349/files/66904332322.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E59 7436 bytes
SHA-256: bbece7c5f22fd6ecb02a2909221e76491176137073db1ff2445a894c3a769dc5
font_01_sfnt_off000077b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77B7 4896 bytes
SHA-256: dfb0f093a44d0c7ef351bb774b013a8a316ad63d1111e864ee774aeee46eb60f
font_02_sfnt_off0000885a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x885A 14652 bytes
SHA-256: aea6fe06b258ebbeba819707d3fd9f5faa298c652ee261d89cc08f495e052326
font_03_sfnt_off0000b587.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB587 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34