Malicious PDF — malware analysis report

Static analysis result for SHA-256 993948bb19ebe3dc…

MALICIOUS

PDF

40.8 KB Created: 2020-08-10 23:23:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 04780ba0c7b069e0e4ac322aff84a50f SHA-1: 2efe6293a971d33382c1f5e02c6df16a90d466c9 SHA-256: 993948bb19ebe3dcfad051360e6575115064812b909ecafb22179e4cf9a0e561
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though partially corrupted, includes text related to downloading Adobe Acrobat Reader, suggesting a social engineering lure. The presence of numerous embedded links, including the primary malicious one, indicates an attempt to redirect users to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious.

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=download+adobe+acrobat+reader+pdf+free In PDF document text
    • http://dozam.cambiadentallab.com/uploads/1/3/1/4/131452821/6217688.pdfIn PDF document text
    • http://files.mybotoxboutique.com/uploads/1/3/0/9/130969572/xafoxavuza_jozijunepap_bikufewuxuzidig_retenolakamaje.pdfIn PDF document text
    • http://lelutuj.ahmedal-azzawi.net/uploads/1/3/1/4/131482975/bikefenatufel.pdfIn PDF document text
    • http://pewakunis.foodfixations.com/uploads/1/3/1/6/131606027/6fe91.pdfIn PDF document text
    • http://gagurobin.katrinaji.com/uploads/1/3/1/4/131437601/7818010.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/1/0440/2449/6286/files/cartoon_drawing_book_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8031/1203/files/bafg_berlin_antrag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4651/0504/files/pexojilegojavatowuzux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6972/5080/files/95915642441.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3378/6518/files/5919258878.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0252/7895/files/16662196579.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1748/7011/files/rexiporegiriduparu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6705/6028/files/fejugewebaxagenosukawaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7753/2824/files/12748689481.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7602/6522/files/70705598086.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2862/7099/files/sisebisulilivipo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6986/6141/files/surevopavalasenuxisevizi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000053b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53B3 4944 bytes
SHA-256: 478d27b56bf9683a1a0485964fadf5ed44535b9b1bdab9a4832afd00eab4016d
font_01_sfnt_off0000649e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x649E 10308 bytes
SHA-256: 55a406c3cc30b4f7eeb60c4438c2c6ac1d66f863802279887da7bd89a6aff625
font_02_sfnt_off000087e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87E7 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f