Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ad48751d7d9497b…

MALICIOUS

PDF

69.1 KB Created: 2020-08-14 07:48:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b80971d69d675879cb4c3bbd38794925 SHA-1: 69ddea471b648e7cd9797024ad3eeb55e6a658f8 SHA-256: 8ad48751d7d9497ba62b02e1bfb202288127031f00568d3b28cf005a0d923b05
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a link farm designed to mimic search engine results, leading to a known malicious redirector. The document also includes a lure for MFA or one-time code harvesting, suggesting a credential phishing attempt. The embedded URLs, particularly the one pointing to 'ttraff.ru', are indicative of a phishing or redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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=synology%20nas%20ds918+%20pdf In PDF document text
    • http://vivolo.boisebestweddings.com/uploads/1/3/1/1/131164211/semuvojadabiwow_bemulegagabumo_bidogedulalis_xiwokewezeworu.pdfIn PDF document text
    • http://files.freshstockjapan.com/uploads/1/3/1/4/131453633/1119338.pdfIn PDF document text
    • http://files.metamoralionsclub.org/uploads/1/3/0/8/130874148/d5fb57cbdd16.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/1/0433/0687/7080/files/77084518355.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8856/6677/files/canon_eos_7d_mark_iii_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2602/2557/files/68801673555.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2071/2098/files/66944994877.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9088/6312/files/fopononeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/96056065099.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7735/4143/files/vevibidovidazinerorir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2873/3352/files/desibufevaxunepelagegike.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8244/1113/files/67904514465.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9748/9561/files/67244795113.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3309/1496/files/tesonevalu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1785/4366/files/65502900894.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1468/3813/files/xapepotoxudesumek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0441/1556/files/35751608416.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
🗂 Part of campaign: freshstockjapan.com 6 samples

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c478.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC478 5720 bytes
SHA-256: 125c66786f617bbe2767dbbd57e9138fa8e9958a94115632a81241e9e1a47dbc
font_01_sfnt_off0000d80d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD80D 15216 bytes
SHA-256: 436ca865dc073bea76ce6d1eddc0542b48dd9353eee767ae5ec3db0fd3560b6f