Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb4d8cddc8370e47…

MALICIOUS

PDF

42.5 KB Created: 2020-08-19 07:52:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b722459530c46c47083c12fee0eb1c8 SHA-1: 6dcea72b0e745647e47917ee36197d107bd536f7 SHA-256: eb4d8cddc8370e47bfc11b125af4da477abd1aee9f8e7d298f215c223b1ca8d9
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, directing to a URL that appears to be a lure for nutritional information. The document body, though heavily obfuscated, contains the same URL and text. The PDF also exhibits characteristics of a link farm, with numerous embedded links to external PDFs, some of which are hosted on potentially malicious domains. The primary malicious IOC is the redirector URL.

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=avena+quaker+manzana+canela+informacion+nutricional
    • http://bafaz.patriot-armory.com/uploads/1/3/2/6/132680848/kotoweg_kibutikezuf_rozezopuwo.pdf
    • http://vijawupun.transformationalastrologyandtarot.com/uploads/1/3/2/6/132681862/7fe904380c9.pdf
    • http://files.ccifcyprus.com/uploads/1/3/0/7/130739012/128f43ad.pdf
    • http://files.tonivuc.com/uploads/1/3/0/7/130776381/nawevaxakuzidevod.pdf
    • https://cdn.shopify.com/s/files/1/0430/9221/3911/files/casebook_in_child_behavior_disorders.pdf
    • https://cdn.shopify.com/s/files/1/0434/3319/7718/files/wetabe.pdf
    • https://cdn.shopify.com/s/files/1/0440/5785/4102/files/31752045310.pdf
    • https://cdn.shopify.com/s/files/1/0434/2281/0268/files/aoe2_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/7596/8928/files/83823792643.pdf
    • https://cdn.shopify.com/s/files/1/0432/6267/3054/files/bazodijabat.pdf
    • https://cdn.shopify.com/s/files/1/0441/1038/1208/files/fallout_new_vegas_mod_pack_2018.pdf
    • https://cdn.shopify.com/s/files/1/0432/3124/8542/files/wisixejox.pdf
    • https://cdn.shopify.com/s/files/1/0431/3156/8277/files/34122976560.pdf
    • https://cdn.shopify.com/s/files/1/0440/7836/6872/files/reraxilixebof.pdf
    • https://cdn.shopify.com/s/files/1/0427/4411/9462/files/elementary_set_theory.pdf
    • https://cdn.shopify.com/s/files/1/0431/7885/2507/files/56434737593.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_off0000663b.bin
91eb2e0810ea0dca25226602746efe4009d09d5e84c49f14ff008e7b7a4fe63e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x663B 5140 bytes
font_01_sfnt_off000077b3.bin
14ca84f8916e9e0f43632c270c7680f80dbf544624155fdac531dfe3335cadc1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77B3 11372 bytes

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