Malicious PDF — malware analysis report

Static analysis result for SHA-256 22c2a6ac438f6842…

MALICIOUS

PDF

64.7 KB Created: 2020-09-01 18:06:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1eccdb11f31787114b690cd7e7be890c SHA-1: 05112d586416aa451a8deeb2e5370f386be68d16 SHA-256: 22c2a6ac438f6842c82ed37c926b157c6ad86286a36ad746281deafa708fc010
152 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.club/wix?keyword=aarakshan+movie+video'. Additionally, it features a PDF link farm with 28 external links, many hosted on cdn.shopify.com. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains the same malicious URL, suggesting the primary intent is to redirect users to a potentially harmful site, likely for phishing or malware distribution.

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.club/wix?keyword=aarakshan+movie+video
    • https://cdn.shopify.com/s/files/1/0427/7967/2735/files/mosesidozadegumejawifenuv.pdf
    • https://cdn.shopify.com/s/files/1/0437/3757/9674/files/4146936340.pdf
    • https://cdn.shopify.com/s/files/1/0437/1136/5272/files/wanijixubudufafuduxofex.pdf
    • https://static.usrfiles.com/ugd/b8c837_1e721ad7b5454fb48fa1b5ac54405ad1.pdf
    • https://static.usrfiles.com/ugd/fb83f1_9453f72c19e44691b554b6b7e7cdb2ee.pdf
    • https://static.usrfiles.com/ugd/e4bc37_72ec90f024f2434186d4ab8d0c2edb11.pdf
    • https://static.usrfiles.com/ugd/78c764_d32dff7b3578468091fce7d4f8eb5875.pdf
    • https://cdn.shopify.com/s/files/1/0431/8127/7345/files/gemosuxuzipafog.pdf
    • https://cdn.shopify.com/s/files/1/0428/1804/4063/files/jelozisejar.pdf
    • https://cdn.shopify.com/s/files/1/0436/0211/6772/files/sisibugemuvizolap.pdf
    • https://cdn.shopify.com/s/files/1/0431/6046/9660/files/47639240727.pdf
    • https://cdn.shopify.com/s/files/1/0429/9436/8671/files/89422760971.pdf
    • https://cdn.shopify.com/s/files/1/0434/0842/5123/files/autocad_2017_to_dwg_conversion.pdf
    • https://cdn.shopify.com/s/files/1/0440/8098/8310/files/fizuluzipejox.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_off0000a863.bin
96576e516dc91ffc8d3f19380fbc8e526b14b05232fb6c59626492f12f18a5df		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA863 5148 bytes
font_01_sfnt_off0000b9bf.bin
283b148e800a586007319ab0852e1e7a3d29808dfc15550e98515efc8e926781		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB9BF 11232 bytes
font_02_sfnt_off0000e05f.bin
e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE05F 16164 bytes

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