Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb0fafe073e7b0f1…

MALICIOUS

PDF

46.7 KB Created: 2020-08-11 16:50:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 16ecf1ad1c5cdb6b98313adfef0767d7 SHA-1: 2429cb39b607a83b2c3610a7db2978397a66a62e SHA-256: fb0fafe073e7b0f1325c8337747a555d9dab180b541283bd4ebef996a05cbde3
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting PDF files, suggesting a link farm or SEO poisoning tactic. One critical heuristic identified a link to a known malicious redirector, 'ttraff.cc', which is used to obscure the ultimate destination. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=bse+odisha+class+9+books+pdf', indicating a lure for educational content to mask malicious redirection.

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=bse+odisha+class+9+books+pdf
    • http://firitu.hatzbythesea.com/uploads/1/3/0/7/130739564/gogiwusitosaj.pdf
    • http://files.mikewritesfunny.com/uploads/1/3/1/1/131164250/ce20dedc.pdf
    • http://files.peacefulvalleyheritage.com/uploads/1/3/1/6/131637190/bc21e10e283.pdf
    • http://files.annettesplacenz.com/uploads/1/3/1/4/131438397/xotojagozo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zijilo.pdf
    • https://cdn.shopify.com/s/files/1/0430/2379/4337/files/lumaziji.pdf
    • https://cdn.shopify.com/s/files/1/0432/0854/0324/files/36411980813.pdf
    • https://cdn.shopify.com/s/files/1/0430/3699/9831/files/40517224628.pdf
    • https://cdn.shopify.com/s/files/1/0432/9046/0324/files/antigen_antibody_reaction_and_their_applications.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gidawibozifuniji.pdf
    • https://cdn.shopify.com/s/files/1/0431/7993/3862/files/94787080551.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kulabegidubonigupux.pdf
    • https://cdn.shopify.com/s/files/1/0436/1686/2371/files/2008_acura_tl_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/0332/2269/files/33556963917.pdf
    • https://cdn.shopify.com/s/files/1/0440/5926/3141/files/fogum.pdf
    • https://cdn.shopify.com/s/files/1/0428/0349/5071/files/75376647966.pdf
    • https://cdn.shopify.com/s/files/1/0430/1229/2767/files/contemporary_college_physics_jones_childers.pdf
    • https://cdn.shopify.com/s/files/1/0431/1315/2673/files/ruminant_animals.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_off000063b7.bin
d725ec85b7c00a28b27d688cb8426fda1fb5b35111d673077fb8a872b59527bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63B7 5556 bytes
font_01_sfnt_off0000768e.bin
32bb7ed7becf7d8fd4c200e67f54fafdf748505a3b3ad7ad1240d147f9ee8060		 pdf-font-stream PDF embedded font (sfnt) at offset 0x768E 9980 bytes
font_02_sfnt_off000098fb.bin
5d72d630640305d452d914085fd6c65e0d8125198bed8028c282d44fd0327be8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98FB 16068 bytes

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