Malicious PDF — malware analysis report

Static analysis result for SHA-256 26c3396c6a4028a0…

MALICIOUS

PDF

58.0 KB Created: 2020-08-07 00:03:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99f5b4a3b8e015b7050934a175c8113b SHA-1: 436c315e9b8d0788d761a0c04f90fcbc99d7816a SHA-256: 26c3396c6a4028a0cc7ece4e7e2edcd88a7e22f4597d8b80aa35379db5299b1b
150 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a high number of embedded links, many of which point to external PDF files. One critical heuristic identified a link to a known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains a reference to the same URL, suggesting a lure or redirection mechanism.

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=makalah+biogas+dari+kotoran+sapi+pdf
    • http://files.dawnentertainment.net/uploads/1/3/0/7/130775403/659c3.pdf
    • http://files.jacksonswim.com/uploads/1/3/0/7/130739614/b671a79d958.pdf
    • http://files.unitedk-12wrestling.com/uploads/1/3/1/4/131410736/915e083595.pdf
    • http://files.connectivehealingservice.com/uploads/1/3/1/4/131438459/bb6761c.pdf
    • https://cdn.shopify.com/s/files/1/0429/5720/9753/files/85549004925.pdf
    • https://cdn.shopify.com/s/files/1/0430/8375/9765/files/xurepijazinajoriwuxize.pdf
    • https://cdn.shopify.com/s/files/1/0436/1653/4690/files/shadows_mantle_set_dungeon.pdf
    • https://cdn.shopify.com/s/files/1/0433/3459/8809/files/8849281789.pdf
    • https://cdn.shopify.com/s/files/1/0433/9105/8083/files/operations_management_krajewski_10th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/0668/0484/files/31058700280.pdf
    • https://cdn.shopify.com/s/files/1/0434/5495/5672/files/79894634426.pdf
    • https://cdn.shopify.com/s/files/1/0431/1531/5351/files/xaganejavufasetude.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/furupokexopaxabisovijuwu.pdf
    • https://cdn.shopify.com/s/files/1/0440/6591/5032/files/multiplicative_vs_additive.pdf
    • https://cdn.shopify.com/s/files/1/0434/6806/2872/files/37170064326.pdf
    • https://cdn.shopify.com/s/files/1/0434/7166/7360/files/57407651821.pdf
    • https://cdn.shopify.com/s/files/1/0431/3009/3728/files/23392668276.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/26450106566.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/1/0433/9105/8083/files/operations_management_krajewski_10th_edition.pd

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009eb3.bin
e25260988b0d10c9d0c091439c92848de9dae9b92e9ca61bccf907084e242aa8
pdf-font-stream PDF embedded font (sfnt) at offset 0x9EB3 5512 bytes
font_01_sfnt_off0000b16f.bin
5189dc346b20a33ca701d417faac760b5d00cf58e605d44d4b53f67aebe2c980
pdf-font-stream PDF embedded font (sfnt) at offset 0xB16F 13372 bytes