Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab2ca1203156ef5a…

MALICIOUS

PDF

32.0 KB Created: 2020-08-31 09:43:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 835bb6f3236957adbb9112e5a60704ec SHA-1: 32ea9bf98db606e857853493be7b2b6ec6313aa5 SHA-256: ab2ca1203156ef5a1a681de5078ec5058f3ad5b2764cf3b35a4abacdd9ff7e6e
120 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, specifically pointing to 'https://ttraff.ru/wix?keyword=counter+terrorist+mod+android+1'. This URL is presented within the document body, disguised as a download for a game mod. The file also exhibits characteristics of a PDF link farm, with numerous embedded links, many pointing to benign Shopify URLs, but the primary malicious link is the clear indicator of compromise. No scripts were extracted from this sample.

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.ru/wix?keyword=counter+terrorist+mod+android+1
    • https://cdn.shopify.com/s/files/1/0465/0870/3894/files/annamalai_tamil_video_songs_free.pdf
    • https://cdn.shopify.com/s/files/1/0439/0069/8792/files/conectivos_para_redao_nota_1000.pdf
    • https://cdn.shopify.com/s/files/1/0454/4213/8262/files/instinct_pet_food_feeding-_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/8704/4515/files/zivewowidotit.pdf
    • https://cdn.shopify.com/s/files/1/0430/1121/1425/files/portugus_xxi_nova_edio.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2119/files/beowulf_grendel_s_mother.pdf
    • https://static.usrfiles.com/ugd/a382ee_bc1f026894844b9f96c43a108dc58704.pdf
    • https://static.usrfiles.com/ugd/e643da_e7fcd54a319746b98e078f02961368e2.pdf
    • https://static.usrfiles.com/ugd/a01749_ba3c7f7a4423442bbfdde2ebd73a2006.pdf
    • https://cdn.shopify.com/s/files/1/0428/2990/6079/files/megafudumumajisufubewe.pdf
    • https://cdn.shopify.com/s/files/1/0434/6871/8233/files/spoken_english_grammar_book.pdf
    • https://cdn.shopify.com/s/files/1/0438/8408/5416/files/55131613515.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_off00004104.bin
415554e826ea1f60fafa40553c5d16ff8ba444bad69616f91bc9a1d4c1207f9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4104 4896 bytes
font_01_sfnt_off0000518f.bin
9611d4e18273b344764ebbb331963a0baae4933689510d5d9fcf38671822b481		 pdf-font-stream PDF embedded font (sfnt) at offset 0x518F 10232 bytes

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