Malicious PDF — malware analysis report

Static analysis result for SHA-256 40a250c5d45a50ef…

MALICIOUS

PDF

59.8 KB Created: 2020-08-05 13:33:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fba902cfdd470beaaa730cd93326fff9 SHA-1: d36566bbb2263ba1d1c361527e24bd1251222486 SHA-256: 40a250c5d45a50ef6c79a18b3841ee5519759801f658389de71ffb791453e31a
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate a high likelihood of this document being used for malicious redirection. The ML classifier also strongly flagged this PDF. The primary malicious IOC is the ttraff.com URL, which likely serves as a gateway to further malicious content or phishing pages.

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/wb?keyword=clasificacion%20de%20los%20conjuntos%20numericos%20pdf In PDF document text
    • http://files.ruthdeyoung.com/uploads/1/3/0/8/130873947/peduwab_walirulofosi_mixabajuvunana.pdfIn PDF document text
    • http://files.washington-scottish.com/uploads/1/3/0/8/130874318/8b0f395751b7b3.pdfIn PDF document text
    • http://files.thejewelvox.com/uploads/1/3/2/7/132740978/nasoteb.pdfIn PDF document text
    • http://files.brandywinepawpatrol.com/uploads/1/3/1/3/131379540/4241923.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/1/0430/9381/9541/files/zixifaliva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8936/2082/files/44897128802.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1791/9909/files/93204319217.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0078/1208/files/grade_4_math_practice_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6769/4490/files/54601344178.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5011/4965/files/gender_barriers_to_communication.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3936/7061/files/brevi_storie_per_bambini_di_prima_elementare.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8463/5544/files/12649407151.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9776/6553/files/firifetiputosabefizuka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6081/2183/files/nims_100b_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4891/9459/files/denesogajekosamatot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9898/7941/files/wwe_theme_song_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2588/2518/files/95571520775.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007edc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EDC 5280 bytes
SHA-256: b43df9991b1caacc7bd2541e4759d743fba6c3e49e2125936bf23fc70d9bddee
font_01_sfnt_off000090b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90B5 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off00009942.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9942 16252 bytes
SHA-256: 739ce921ec7b68d0717c13dad299893f5f5ed3055bae934ccb85c3a6dfbc7980
font_03_sfnt_off0000cb72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB72 16352 bytes
SHA-256: 54ae156e1cb4ca24283df734cb3e391abab0b08df543301e630bb3f9031a6bdd