Malicious PDF — malware analysis report

Static analysis result for SHA-256 e896c1bd54c28a2a…

MALICIOUS

PDF

41.1 KB Created: 2020-08-04 17:44:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8af7d5ff03d153e1688a7e50a99c2931 SHA-1: a31a4ff0522db0702c1f0cd80d1104c6af30fc45 SHA-256: e896c1bd54c28a2a098b3cb28d7933713abd3c01dad2cfb5cee34643b89d7811
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which are to Shopify domains hosting other PDFs, suggesting a link farm for SEO poisoning. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is used to lure users with the promise of downloading a specific engineering textbook. The document body, though partially corrupted, contains text related to this lure and the redirector URL. The presence of a malicious redirector indicates an attempt to lead the user to a malicious site.

Heuristics 3

  • 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.
  • 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/pify?keyword=water+supply+and+sanitary+engineering+by+rangwala+pdf+free+download
    • http://files.getitwright.com/uploads/1/3/0/7/130776788/pufim-fafopunatobi.pdf
    • http://files.fauquiershowandsale.org/uploads/1/3/1/4/131438784/0dfd5f1.pdf
    • http://files.prospectorpark.com/uploads/1/3/2/7/132710782/58294477.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37237973095.pdf
    • https://cdn.shopify.com/s/files/1/0433/0671/3253/files/58810234035.pdf
    • https://cdn.shopify.com/s/files/1/0431/4375/7992/files/saints_row_3_cheats_for_ps3.pdf
    • https://cdn.shopify.com/s/files/1/0431/4916/4698/files/41077729673.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/34530012154.pdf
    • https://cdn.shopify.com/s/files/1/0432/4130/8320/files/fuludekifog.pdf
    • https://cdn.shopify.com/s/files/1/0427/6341/9815/files/90141739768.pdf
    • https://cdn.shopify.com/s/files/1/0429/8362/0757/files/vogiziruzedi.pdf
    • https://cdn.shopify.com/s/files/1/0435/8042/4351/files/buzulugefixob.pdf
    • https://cdn.shopify.com/s/files/1/0439/4123/2795/files/fimanajaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/1806/7876/files/144242199.pdf
    • https://cdn.shopify.com/s/files/1/0431/7868/8674/files/moxikigumorumexazuja.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_off000062ea.bin
713bd7253c960949f62af5db27f37a3795ec796c162e28692ef81bc721989225		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62EA 5556 bytes
font_01_sfnt_off00007600.bin
366dc9de3e45a1cadfae45a0493caa79ab98616e77c9e8d659589ab67e1f4944		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7600 9700 bytes

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