Malicious PDF — malware analysis report

Static analysis result for SHA-256 c27fd739abec3421…

MALICIOUS

PDF

53.4 KB Created: 2020-08-08 02:29:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0ba3dedc799af85786643dd5b1cea72e SHA-1: d59a20143a3f0f16e38c42e0fcfaa40fad6a5ac1 SHA-256: c27fd739abec3421f83b86ecc88bafd2dd08112830a8c5c5124f8c169b3c4e69
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=batman+killing+joke+comic+pdf'. The document body, though heavily obfuscated, contains this same URL, suggesting the primary intent is to trick the user into clicking this link. The PDF also exhibits characteristics of a link farm, with numerous external links, including one to a Shopify domain, likely for SEO manipulation or to host further malicious content.

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=batman+killing+joke+comic+pdf
    • http://files.gilliancarmoodie.com/uploads/1/3/2/7/132740480/saxokigavewetep.pdf
    • http://files.laacartscenter.org/uploads/1/3/1/1/131163879/jawezuvosekonoti.pdf
    • http://files.vetiveracupuncture.com/uploads/1/3/0/8/130874284/9e33c010ca5b63.pdf
    • http://files.love-ebikes.com/uploads/1/3/0/8/130874125/c98f57fa250d.pdf
    • https://cdn.shopify.com/s/files/1/0439/6895/4526/files/bailey_and_love_s_short_practice_of_surgery_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/2779/9969/files/tukiwujodonivatagarisatu.pdf
    • https://cdn.shopify.com/s/files/1/0438/1127/4914/files/66211773687.pdf
    • https://cdn.shopify.com/s/files/1/0431/8851/9080/files/jitopiroxafidivozuni.pdf
    • https://cdn.shopify.com/s/files/1/0428/5192/6183/files/sisiwusizonerenalinufoda.pdf
    • https://cdn.shopify.com/s/files/1/0436/0926/0190/files/les_logia_agrapha.pdf
    • https://cdn.shopify.com/s/files/1/0429/2398/3015/files/7487864559.pdf
    • https://cdn.shopify.com/s/files/1/0431/7154/5237/files/1038342973.pdf
    • https://cdn.shopify.com/s/files/1/0432/8115/4214/files/zegegibisixibawot.pdf
    • https://cdn.shopify.com/s/files/1/0429/1212/0998/files/jobagazetepero.pdf
    • https://cdn.shopify.com/s/files/1/0430/6498/3701/files/blockchain_developer_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0432/7381/4172/files/jolopasupoza.pdf
    • https://cdn.shopify.com/s/files/1/0434/1268/4967/files/php_fpm_conf.pdf
    • https://cdn.shopify.com/s/files/1/0433/8440/6181/files/jonas_brothers_lovebug.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_off000084ca.bin
9c8d7304ad5e80f724ee36513abbda836103c69e02309957d39bd4e18ffad36a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84CA 5180 bytes
font_01_sfnt_off0000965a.bin
ed1fc5319d541aefcd856764812950ba807bb28b98377466321a9b2c0083dc96		 pdf-font-stream PDF embedded font (sfnt) at offset 0x965A 10480 bytes
font_02_sfnt_off0000ba19.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA19 4324 bytes

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