Malicious PDF — malware analysis report

Static analysis result for SHA-256 f77b1c659358e5a3…

MALICIOUS

PDF

65.1 KB Created: 2020-08-07 22:48:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0316a71403acc141bb1e29100224ed97 SHA-1: e47814e91f3b06c037f75e9c8dcb6152f75c0f70 SHA-256: f77b1c659358e5a38a2dbb70955f7fb89a94be67908293c0ae02b500110a08f2
150 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 are designed to mimic book titles, suggesting a link farm or SEO poisoning tactic. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is used to obscure the final destination. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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.cc/pify?keyword=a.+d.+a.+m.+student+atlas+of+anatomy+pdf
    • http://porenib.lemonstreetgallery.org/uploads/1/3/1/3/131378950/niveveban.pdf
    • http://files.brisenodds.com/uploads/1/3/1/8/131871433/nasagilomijaruma.pdf
    • http://nukusa.elvesterbc.com/uploads/1/3/0/7/130738731/5815519.pdf
    • http://files.ocassionalroadtripper.com/uploads/1/3/1/4/131453645/zilewobulipiwel_fozegoduvawat.pdf
    • http://files.pinnaclewheelworks.com/uploads/1/3/0/9/130969498/gaxigavupo.pdf
    • https://cdn.shopify.com/s/files/1/0429/8155/6375/files/sims_3_cc_tumblr.pdf
    • https://cdn.shopify.com/s/files/1/0431/6610/5759/files/the_eye_of_the_world.pdf
    • https://cdn.shopify.com/s/files/1/0429/0985/9999/files/96537757755.pdf
    • https://cdn.shopify.com/s/files/1/0438/9509/5464/files/bukagakid.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kefemomorevogik.pdf
    • https://cdn.shopify.com/s/files/1/0430/7150/4537/files/56183486533.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xuvekalododit.pdf
    • https://cdn.shopify.com/s/files/1/0431/2249/1541/files/watch_the_princess_bride_online.pdf
    • https://cdn.shopify.com/s/files/1/0431/3507/4465/files/shark_handheld_steam_cleaner.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/redukenedobitaguwowok.pdf
    • https://cdn.shopify.com/s/files/1/0432/3953/8851/files/bose_av3-_2-_1.pdf
    • https://cdn.shopify.com/s/files/1/0430/7373/2768/files/44625723692.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b406.bin
b1399bcb06076c9d2ee9cd28e33fca59ff4a098bbec7ff6dfb83a344165fd622
pdf-font-stream PDF embedded font (sfnt) at offset 0xB406 5048 bytes
font_01_sfnt_off0000c533.bin
06227163bcf0b1bff47a26f86bfec4c08ffd992e93182b8eb02cb1e3dcf3d35d
pdf-font-stream PDF embedded font (sfnt) at offset 0xC533 10436 bytes
font_02_sfnt_off0000e8e2.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E2 4324 bytes