Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa2833be48f6ce69…

MALICIOUS

PDF

41.9 KB Created: 2020-09-04 18:54:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2ea1d11a16d0635b0e65a68e3e8ebbf2 SHA-1: b62a1502c815315e3ac97b70e0e70ddbd8a887f2 SHA-256: fa2833be48f6ce6992d6c918c2bc821d0e8d8e2f7fffe9dd4d3ec33757f6414a
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, with one pointing to the known malicious redirector 'ttraff.club'. This suggests the document is designed to lead users to malicious websites, likely for phishing or malware distribution. The ML classifier also strongly indicated maliciousness.

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=akshara+serial+all+songs
    • https://cdn.shopify.com/s/files/1/0430/8379/2533/files/88767781706.pdf
    • https://cdn.shopify.com/s/files/1/0435/5692/9687/files/mezenasorogemup.pdf
    • https://cdn.shopify.com/s/files/1/0428/5543/2348/files/96306722373.pdf
    • https://cdn.shopify.com/s/files/1/0436/3150/9664/files/28728059760.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/42778697636.pdf
    • https://cdn.shopify.com/s/files/1/0435/6790/6979/files/smartsheet_reviews_glassdoor.pdf
    • https://cdn.shopify.com/s/files/1/0460/1197/3799/files/amazing_saturday_sub_indo_blackpink.pdf
    • https://cdn.shopify.com/s/files/1/0431/6597/4690/files/30528238811.pdf
    • https://cdn.shopify.com/s/files/1/0431/9952/9120/files/jopefivaxugaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/1801/8203/files/69289682747.pdf
    • https://cdn.shopify.com/s/files/1/0440/0375/4142/files/don_t_fear_the_reaper_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0433/4875/4600/files/wuzebamaluko.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_off00005f8a.bin
32d2ce0e801fb597fc30f19ae72b0f6ba56ed4e363cbf6a715c58f359f7f93bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F8A 5000 bytes
font_01_sfnt_off00007084.bin
0153878772dd5ecdefcf2d243e415996b19706fd059df243dc821d03e0f4569b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7084 13684 bytes

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