Malicious PDF — malware analysis report

Static analysis result for SHA-256 17ab96d4fd4648ea…

MALICIOUS

PDF

50.5 KB Created: 2020-09-09 01:58:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d745e75801cfe567e925e111e0bc9cf SHA-1: 63c85143b5e44cfa8856704fbce16065d0065237 SHA-256: 17ab96d4fd4648ea677b050a29b5420f320bb644a43975f7a5a6f697554ac4a6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm. One critical heuristic identified a link to a known malicious redirector, ttraff.me, which is likely the primary malicious destination. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs supports a phishing or redirection attack pattern.

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.me/wix?keyword=chopin+script+font
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/0263/2104/files/chikku_bukku_railu_vandi_song_starmusiq.pdf
    • https://cdn.shopify.com/s/files/1/0433/4256/1433/files/meferitimolasirinor.pdf
    • https://cdn.shopify.com/s/files/1/0431/8029/4298/files/nekavelin.pdf
    • https://static.usrfiles.com/ugd/a4c1fa_d284ba325d4e4b97b5f92462d4453d24.pdf
    • https://static.usrfiles.com/ugd/12f4eb_d7beb408270f46eab8a2be6cbf795211.pdf
    • https://static.usrfiles.com/ugd/0d2fda_e9399eb8e5be44edbfd7bf88e34eac4b.pdf
    • https://cdn.shopify.com/s/files/1/0434/3011/7526/files/46641539211.pdf
    • https://cdn.shopify.com/s/files/1/0435/5339/0743/files/gegiburijaxolusoju.pdf
    • https://cdn.shopify.com/s/files/1/0433/5281/7832/files/cisco_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0428/9799/7991/files/93129247444.pdf
    • https://cdn.shopify.com/s/files/1/0440/1322/4094/files/36858685086.pdf
    • https://cdn.shopify.com/s/files/1/0432/6037/9286/files/21127908083.pdf
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/entrepreneurship_ncert_book_class_11.pdf
    • https://cdn.shopify.com/s/files/1/0430/8336/6551/files/9844864704.pdf
    • https://cdn.shopify.com/s/files/1/0432/6971/8182/files/98116618510.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000053cf.bin
f89e531c95666dc1e440a3f7269f6db1654901d8cb209cfb47cb9e85e86b6b4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53CF 4764 bytes
font_01_sfnt_off000063fb.bin
b874e2c24fde432d64ded355ea78f1b1044b25a499b9b2466c7edc4a8cf0f777		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63FB 2832 bytes
font_02_sfnt_off00006ff0.bin
168e9a598bc70b5f30a22ea5d04b84be90667cc8c685692fd8fbc98b405e857c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FF0 17188 bytes
font_03_sfnt_off0000a551.bin
06bfe50daf6346a8319f5246c62dd4e491e5d1f7ee0b9dad2338c154a4edc25e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA551 16328 bytes

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