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)
MD5: 04780ba0c7b069e0e4ac322aff84a50f SHA-1: 2efe6293a971d33382c1f5e02c6df16a90d466c9 SHA-256: 993948bb19ebe3dcfad051360e6575115064812b909ecafb22179e4cf9a0e561
150 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 3

  • 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.
  • 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
    • http://dozam.cambiadentallab.com/uploads/1/3/1/4/131452821/6217688.pdf
    • http://files.mybotoxboutique.com/uploads/1/3/0/9/130969572/xafoxavuza_jozijunepap_bikufewuxuzidig_retenolakamaje.pdf
    • http://lelutuj.ahmedal-azzawi.net/uploads/1/3/1/4/131482975/bikefenatufel.pdf
    • http://pewakunis.foodfixations.com/uploads/1/3/1/6/131606027/6fe91.pdf
    • http://gagurobin.katrinaji.com/uploads/1/3/1/4/131437601/7818010.pdf
    • https://cdn.shopify.com/s/files/1/0440/2449/6286/files/cartoon_drawing_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/8031/1203/files/bafg_berlin_antrag.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0504/files/pexojilegojavatowuzux.pdf
    • https://cdn.shopify.com/s/files/1/0437/6972/5080/files/95915642441.pdf
    • https://cdn.shopify.com/s/files/1/0438/3378/6518/files/5919258878.pdf
    • https://cdn.shopify.com/s/files/1/0430/0252/7895/files/16662196579.pdf
    • https://cdn.shopify.com/s/files/1/0428/1748/7011/files/rexiporegiriduparu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6705/6028/files/fejugewebaxagenosukawaw.pdf
    • https://cdn.shopify.com/s/files/1/0434/7753/2824/files/12748689481.pdf
    • https://cdn.shopify.com/s/files/1/0430/7602/6522/files/70705598086.pdf
    • https://cdn.shopify.com/s/files/1/0432/2862/7099/files/sisebisulilivipo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6986/6141/files/surevopavalasenuxisevizi.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • https://cdn.shopify.com/s/files/1/0430/6986/6141/files/surevopaval

Extracted artifacts 3

Files carved from inside the sample during analysis.

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