Malicious PDF — malware analysis report

Static analysis result for SHA-256 d597f76fdb27556b…

MALICIOUS

PDF

47.1 KB Created: 2020-08-08 05:22:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5955dbc8d0375cb88e6f8134f129b423 SHA-1: 40271144abe4e8590760366e595646715f813887 SHA-256: d597f76fdb27556b53b99090f1ca9061289f24a46f218f456f3743f6c512f026
128 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 'ttraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The document body, though heavily obfuscated, contains text related to 'flight ticket form pdf' and the malicious URL, reinforcing the lure. The primary attack pattern involves tricking the user into clicking a malicious link that leads to further compromise.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/pify?keyword=flight+ticket+form+pdf
    • http://files.friendsofparkswf.com/uploads/1/3/0/7/130739004/436414c618b.pdf
    • http://files.cog7denver.org/uploads/1/3/1/0/131071157/9236544.pdf
    • http://xawibir.gospelhillministry.org/uploads/1/3/0/8/130814411/6d11e88e66c3.pdf
    • http://files.sruthilayaa.com/uploads/1/3/1/4/131407571/6128424.pdf
    • http://files.cherryhurstcivic.org/uploads/1/3/1/4/131406506/titidimekipizere.pdf
    • https://cdn.shopify.com/s/files/1/0434/4964/7270/files/82169109610.pdf
    • https://cdn.shopify.com/s/files/1/0431/7301/9808/files/nuxewaxagisapar.pdf
    • https://cdn.shopify.com/s/files/1/0438/2906/7933/files/hernia_de_hiato_en_perros.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/kulibapegipoxekigewo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6728/5410/files/sufuditigujafuxez.pdf
    • https://cdn.shopify.com/s/files/1/0435/1954/1416/files/wujaneviwoforuzajuwe.pdf
    • https://cdn.shopify.com/s/files/1/0437/1218/4474/files/tibageraji.pdf
    • https://cdn.shopify.com/s/files/1/0434/5279/2982/files/bememirerapabokamelen.pdf
    • https://cdn.shopify.com/s/files/1/0432/9753/8203/files/pojekatiseta.pdf
    • https://cdn.shopify.com/s/files/1/0427/6004/4710/files/execv_vs_execvp.pdf
    • https://cdn.shopify.com/s/files/1/0428/8951/1071/files/fojenumugafakotir.pdf
    • https://cdn.shopify.com/s/files/1/0430/7684/5728/files/kiligemogazi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d7b.bin
96b72eb932a7df68d9b4fabaff7d65de6bf2a28a26c58741a507bdaa3a236798
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D7B 4880 bytes
font_01_sfnt_off00007e1d.bin
39628c96acf839c4e841e6f03bfdb3680626e96d628551bfee1ae09b1c59d20d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E1D 10404 bytes
font_02_sfnt_off0000a1ac.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0xA1AC 4324 bytes