Malicious PDF — malware analysis report

Static analysis result for SHA-256 f54aae5380e9a0b8…

MALICIOUS

PDF

37.3 KB Created: 2020-09-01 01:55:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e981351b09a781eb54a24e4d04eae99 SHA-1: c83369616a28e1319ccdb33b69ced87dbcc95f48 SHA-256: f54aae5380e9a0b8ba5fcc0e6867135b477d04210496c7e01ea72dfe69f41a07
152 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/wix?keyword=community+tourism+planning+guidelines'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many of which point to Shopify domains. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same malicious URL and several benign-looking Shopify URLs, suggesting a lure to a malicious site disguised as a document.

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/wix?keyword=community+tourism+planning+guidelines
    • https://cdn.shopify.com/s/files/1/0432/8692/1376/files/2825416410.pdf
    • https://cdn.shopify.com/s/files/1/0434/9070/5573/files/14397051087.pdf
    • https://cdn.shopify.com/s/files/1/0430/4420/8789/files/50172240135.pdf
    • https://cdn.shopify.com/s/files/1/0435/5050/7163/files/abridged_prospectus.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wunize.pdf
    • https://static.usrfiles.com/ugd/b8c837_3e1279d65a5043e0b0f3c7dd1854f029.pdf
    • https://static.usrfiles.com/ugd/a59130_8557346682fe4a11be294c6d318c1a0d.pdf
    • https://static.usrfiles.com/ugd/b8c837_051ad0a2673f4287b6d7440a6db212f2.pdf
    • https://static.usrfiles.com/ugd/7baf93_bc506c6e7d524511a845ab6d847d2410.pdf
    • https://static.usrfiles.com/ugd/6cf0f5_3218fda6a1a74575a35fd6b8014b8dc6.pdf
    • https://static.usrfiles.com/ugd/fd3290_e9f1f6df6f3046f691e70d0517b29274.pdf
    • https://static.usrfiles.com/ugd/d5415a_bc6add899ede42c5969deaba2699647f.pdf
    • https://static.usrfiles.com/ugd/b8c837_b59b1d8d819844ac988511e86a987417.pdf
    • https://static.usrfiles.com/ugd/d54300_99c2f1b80b84404dbcb068d8c7820d80.pdf
    • https://static.usrfiles.com/ugd/c068f8_4970a7e637fc454685aa3252af9f3940.pdf
    • https://static.usrfiles.com/ugd/ab059d_e85921fd41994cf49c9f05b64f1ce391.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_off000055e9.bin
fae3d9a3aebdf8e50823f5e65addd579d89a3bdd7c6ab24897a86bbe280f1916		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55E9 5288 bytes
font_01_sfnt_off000067cf.bin
823ed75c4476532853edb4eb6bed0990801dcbf47fa8e12994a07f607c8c1099		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67CF 9524 bytes

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