Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7f6fd90077bff05…

MALICIOUS

PDF

34.6 KB Created: 2020-08-12 10:48:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7fe91c2ebec76ea57fcacdacc74e7c2d SHA-1: 2ae33d70ef67dfc8ce25644ef51d315416f6c18a SHA-256: a7f6fd90077bff0573ade45938ffcdefca2348a269fad5184f245aa977cf6beb
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector, specifically 'https://ttraff.cc/pify?keyword=upsc+sociology+optional+question+paper+2020+pdf'. This suggests the document is designed to redirect users to malicious sites, likely for phishing or malware distribution. The document body contains garbled text but also includes the malicious URL and several benign-looking Shopify links, reinforcing the lure.

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.cc/pify?keyword=upsc+sociology+optional+question+paper+2020+pdf
    • http://kupule.themutedwalls.com/uploads/1/3/2/6/132696434/b3c1eb4783e.pdf
    • http://files.communication.work/uploads/1/3/0/8/130813369/2688180.pdf
    • http://files.bonbonchiffon.com/uploads/1/3/1/3/131379049/bb4e497e.pdf
    • https://cdn.shopify.com/s/files/1/0433/9977/4364/files/applied_mathematics_project.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7741/files/ascaridiose_traitement.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/colour_blindness_test_plates.pdf
    • https://cdn.shopify.com/s/files/1/0435/5083/4847/files/circle_geometry_theorems_grade_12.pdf
    • https://cdn.shopify.com/s/files/1/0438/8945/9368/files/k_camp_comfortable.pdf
    • https://cdn.shopify.com/s/files/1/0427/8799/5807/files/fosutavumapexa.pdf
    • https://cdn.shopify.com/s/files/1/0433/6012/5080/files/10757174531.pdf
    • https://cdn.shopify.com/s/files/1/0441/0654/7352/files/gta_chinatown_wars_ds_rom.pdf
    • https://cdn.shopify.com/s/files/1/0430/1740/4573/files/29223070119.pdf
    • https://cdn.shopify.com/s/files/1/0427/4470/9276/files/nojemukaritawodagi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9105/8083/files/gunasibise.pdf
    • https://cdn.shopify.com/s/files/1/0437/3954/5761/files/tebikutojufepovuvagifi.pdf
    • https://cdn.shopify.com/s/files/1/0429/9217/3217/files/lateral_thinking_puzzles_paul_sloane.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000048ff.bin
c434fedda1c1e99d33a2041c85c4b4a3c807f3eb35ea2d67fb1dc3f4820f5ed1
pdf-font-stream PDF embedded font (sfnt) at offset 0x48FF 5816 bytes
font_01_sfnt_off00005ccd.bin
38abaa53ede1fcc9365117d50606a656a6f7d7752f6f88299e46154f3c8bf417
pdf-font-stream PDF embedded font (sfnt) at offset 0x5CCD 9508 bytes