Malicious PDF — malware analysis report

Static analysis result for SHA-256 b61695314eaa3720…

MALICIOUS

PDF

51.8 KB Created: 2020-08-29 18:47:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cdb569888853a02ca29a718015efd9b9 SHA-1: edd6cf9a44627cfb96ec16187d216a3d555773e0 SHA-256: b61695314eaa3720cd9cb95a18c5d9b6b29a3bb7bef09ae341eaff1d2b472ee8
152 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=boonie+bears+entangled+worlds+full+m'. The document body also contains this URL along with numerous other links hosted on shopify.com, suggesting a link farm or SEO poisoning tactic. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be directing users to a malicious site via a deceptive link within the PDF.

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=boonie+bears+entangled+worlds+full+m
    • https://cdn.shopify.com/s/files/1/0434/6888/2072/files/sisitibapafepefigodifar.pdf
    • https://cdn.shopify.com/s/files/1/0429/9980/8149/files/roresetozo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6088/7705/files/terinudivegof.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lebalod.pdf
    • https://static.usrfiles.com/ugd/80c1db_5bcdb7b2098d4b87a5e0bde0fe9f1927.pdf
    • https://static.usrfiles.com/ugd/b56239_a3748850bcb74b2f8e4c33b8381d5d94.pdf
    • https://static.usrfiles.com/ugd/b8c837_1353e6e07bad48c5b2d358914f14a1f0.pdf
    • https://static.usrfiles.com/ugd/289c5e_c6470845da05493d89f7834662839b79.pdf
    • https://static.usrfiles.com/ugd/b8c837_c263528a7c924f2cafb1adabde3828a9.pdf
    • https://static.usrfiles.com/ugd/b8c837_d746cacea8cd4c9a86ccd86b9cf76171.pdf
    • https://cdn.shopify.com/s/files/1/0433/9079/5941/files/algebra_1_textbook_pearson.pdf
    • https://cdn.shopify.com/s/files/1/0439/1878/6728/files/bharat_ka_naksha_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/5107/4204/files/chunks_malayalam_movie_masswap.pdf
    • https://cdn.shopify.com/s/files/1/0438/2749/5074/files/datakitobej.pdf
    • https://cdn.shopify.com/s/files/1/0433/8758/4677/files/nokeve.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_off00006db3.bin
a50d440d898663cd0715fa157b2e6c0b4a15dca293fc5c9535ba319349d95ff3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DB3 5116 bytes
font_01_sfnt_off00007f6d.bin
af27a06906cd10bbd196d4315ef333ee02e6611b5ff1557cd070a22afa1e6cdc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F6D 5508 bytes
font_02_sfnt_off00009215.bin
3175e218a2a9978bcb17c208e788becdb8f55581fdeb2484201ee9c207cf6d20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9215 14720 bytes

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