Malicious PDF — malware analysis report

Static analysis result for SHA-256 262dd6e68deb5107…

MALICIOUS

PDF

62.2 KB Created: 2020-08-22 01:50:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 202f30a0df141c332886c880e574dcb7 SHA-1: 33bcf988e71b3bb9c1b1441354e69386e3c016b8 SHA-256: 262dd6e68deb5107ae318682f32bcf76d1f5eea1ebb1ead4ce5f4aa1ee1cc026
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF was flagged as malicious due to a critical heuristic identifying a link farm pointing to known malicious redirector infrastructure. The document body contains a URL that is also present in the heuristics, suggesting a phishing or scam attempt. The presence of numerous external PDF links further supports the link farm attack pattern. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.cc/pify?keyword=consumer+reports+shark+vacuum+cleaners
    • http://monigi.romanianartworks.com/uploads/1/3/1/8/131871991/da9163f8.pdf
    • http://files.40yearsafter.com/uploads/1/3/0/7/130739713/wetanijizukerub.pdf
    • http://files.msmaco.com/uploads/1/3/1/4/131453560/tixukenukidubule.pdf
    • http://files.standrewsweb.com/uploads/1/3/0/8/130874474/gilulinatozad_sibipuzifevuvu_nafizaluf_leloduvipajawul.pdf
    • https://cdn.shopify.com/s/files/1/0433/5425/9610/files/colour_to_black_and_white_converter.pdf
    • https://cdn.shopify.com/s/files/1/0431/4615/0039/files/90081245778.pdf
    • https://cdn.shopify.com/s/files/1/0431/3009/3728/files/smoothie_diet.pdf
    • https://cdn.shopify.com/s/files/1/0431/7410/1160/files/fegasamusevudutofi.pdf
    • https://cdn.shopify.com/s/files/1/0438/0744/1053/files/32746720942.pdf
    • https://cdn.shopify.com/s/files/1/0439/7747/4206/files/strategy_games_android_free_offline.pdf
    • https://cdn.shopify.com/s/files/1/0437/6012/4065/files/votaroxapilifeli.pdf
    • https://cdn.shopify.com/s/files/1/0427/4513/5260/files/92215998650.pdf
    • https://cdn.shopify.com/s/files/1/0427/5752/1574/files/situbogizoketemukumi.pdf
    • https://cdn.shopify.com/s/files/1/0429/1425/0905/files/35550174946.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_off0000b6e0.bin
e86a670523fbe6ae5b0dddc2ff2e1374c930447677eb7406f4f11e874d8192aa
pdf-font-stream PDF embedded font (sfnt) at offset 0xB6E0 5200 bytes
font_01_sfnt_off0000c85e.bin
857130c1ec6dc7cf0fc62efda722010aa07166f44c833928f77c334e8a97113f
pdf-font-stream PDF embedded font (sfnt) at offset 0xC85E 10296 bytes