Malicious PDF — malware analysis report

Static analysis result for SHA-256 f14948b444c1ac8d…

MALICIOUS

PDF

37.1 KB Created: 2020-08-31 07:08:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3b2347dc9f24cf24042e62e514192c2 SHA-1: c0bf3c2be85ce0e2851b59f244465834ff6895ad SHA-256: f14948b444c1ac8d0a4dc31d578b2de0fe53bd058c6a614eec3e19deaa4e86e1
154 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to PDF files hosted on Shopify. One of these links, however, redirects to the malicious domain 'ttraff.cc'. This suggests a link farm or redirection tactic designed to obscure the final malicious destination. 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.cc/wix?keyword=developmental+mathematics+2nd+edition+franklin+wright
    • https://cdn.shopify.com/s/files/1/0431/7223/3380/files/fatca_reporting_1_ffi.pdf
    • https://cdn.shopify.com/s/files/1/0449/8187/8942/files/international_public_relations_negotiating_culture_identity_and_power.pdf
    • https://cdn.shopify.com/s/files/1/0466/4999/9525/files/xasakowimepixezujitat.pdf
    • https://cdn.shopify.com/s/files/1/0433/4115/2421/files/tozagazusugugunokarufuwel.pdf
    • https://static.usrfiles.com/ugd/38bf1f_b0f462449e7a4e5a81a8142226e902b6.pdf
    • https://static.usrfiles.com/ugd/b48b60_474826e685b64e8a9a72b7793292528f.pdf
    • https://cdn.shopify.com/s/files/1/0432/4586/3067/files/mivinusujomufobu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7494/4153/files/10766189947.pdf
    • https://cdn.shopify.com/s/files/1/0434/1553/5774/files/xujum.pdf
    • https://cdn.shopify.com/s/files/1/0433/6762/8950/files/aaina_movie_song_bestwap.pdf
    • https://cdn.shopify.com/s/files/1/0440/3272/1046/files/leseromerapipamuforulobe.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_off000051b8.bin
228e31249ce58b9312398b86dd46d4343f5c55080fc14c37bbfb2ee7fbfbd905		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51B8 5916 bytes
font_01_sfnt_off000065c8.bin
d073c06c6c044edac5a618ee38d925162d9d55bcb16cfd974ce6c26df3d3a68f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65C8 9948 bytes

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