Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfbeb64b8a8a297f…

MALICIOUS

PDF

49.1 KB Created: 2020-08-06 11:24:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc7321e641bdb9758887d7d04617b091 SHA-1: abb1e218f62acf90004016e13e2069a8894c65ad SHA-256: bfbeb64b8a8a297f465a175f7ea5128da7dd5eebeecee3fa07775c1c0bc6a9d1
152 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=car+alternator+specification+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains the same URL, suggesting a lure to disguise malicious redirection. 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=car+alternator+specification+pdf
    • http://files.hissongphotography.com/uploads/1/3/1/4/131406391/9931015b.pdf
    • http://files.kaseymoran.com/uploads/1/3/0/9/130969573/movapovavur.pdf
    • http://files.lightsoutbaltimore.org/uploads/1/3/1/0/131070718/1149199.pdf
    • http://files.hissongphotography.com/uploads/1/3/1/4/1314
    • https://cdn.shopify.com/s/files/1/0431/1708/4833/files/terramite_t5c_parts.pdf
    • https://cdn.shopify.com/s/files/1/0433/8873/1543/files/fakinupivegof.pdf
    • https://cdn.shopify.com/s/files/1/0434/4109/4812/files/anatomy_of_heart_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/8812/5857/files/1945512618.pdf
    • https://cdn.shopify.com/s/files/1/0430/6406/6209/files/gomapiwarejonopat.pdf
    • https://cdn.shopify.com/s/files/1/0428/8957/6601/files/rogosavigotiri.pdf
    • https://cdn.shopify.com/s/files/1/0430/3293/6605/files/14235625773.pdf
    • https://cdn.shopify.com/s/files/1/0431/6459/8434/files/mnemonic_dictionary_gre_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/8999/2605/files/72682874096.pdf
    • https://cdn.shopify.com/s/files/1/0431/7141/4167/files/colors_chief_keef_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/4639/5304/files/gimp_save_as_png.pdf
    • https://cdn.shopify.com/s/files/1/0438/4981/0080/files/6050990943.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_off0000756d.bin
34ba3d99988b35957eb7e7980c24acdddbe1de4a5f7a1a9e21a3969802925fc8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x756D 4960 bytes
font_01_sfnt_off00008655.bin
5a4d6486e15ec3e7e41ea4fd582fca07429044482a919ea0adb5cb06e7c2460c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8655 10164 bytes
font_02_sfnt_off0000a908.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA908 4324 bytes

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