Malicious PDF — malware analysis report

Static analysis result for SHA-256 b917a65f134cbd69…

MALICIOUS

PDF

115.3 KB Created: 2020-08-02 12:47:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0beb2b9d6e964b76ce667675fb472885 SHA-1: 4163e6d0b091ada6929a5c0efadd7ffc619504e0 SHA-256: b917a65f134cbd694ec6b869ac912177694ff413872a6b1a4db094608230b24c
152 Risk Score

Malware Insights

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

The PDF contains a prominent link that redirects to a malicious URL, disguised with text related to 'fullmetal alchemist'. This indicates a social engineering attempt to trick the user into visiting a potentially harmful site. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute the malicious content. No scripts were extracted, but the primary malicious functionality appears to be the redirection to the ttraff.cc domain.

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/pify?keyword=read+fullmetal+alchemist+mangahere
    • http://files.creeksideband.com/uploads/1/3/1/3/131384789/3301404.pdf
    • http://files.ourhouse-yourhome.com/uploads/1/3/1/4/131406629/natujuviteloz-wupejezavezan.pdf
    • http://files.crengtech.com/uploads/1/3/1/6/131636995/galitulawed-vuguzeg-suzomax-pobire.pdf
    • http://files.tyruben.com/uploads/1/3/0/8/130813769/finuvenemejo.pdf
    • https://cdn.shopify.com/s/files/1/0433/5199/8623/files/bijawatowerekus.pdf
    • https://cdn.shopify.com/s/files/1/0433/6025/6159/files/gijape.pdf
    • https://cdn.shopify.com/s/files/1/0431/1816/6167/files/roborola.pdf
    • https://cdn.shopify.com/s/files/1/0430/9303/3117/files/mixuvefajopu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9931/5610/files/luxedavixuga.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/98774508290.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gejazopemovaro.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/27392185694.pdf
    • https://cdn.shopify.com/s/files/1/0434/7409/2196/files/vuzalowilafofemu.pdf
    • https://cdn.shopify.com/s/files/1/0433/2896/2715/files/zanisomam.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_off0000f3a9.bin
b006ced59b597600c6a34c9becab47275af36fbd9544786053dae97a71ed7943
pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A9 44180 bytes
font_01_sfnt_off00017bc1.bin
62783d12e9f9aa1ec63a63de4119f7823f7f7ff5467156d10a2a14480d6060a2
pdf-font-stream PDF embedded font (sfnt) at offset 0x17BC1 5444 bytes
font_02_sfnt_off00018e20.bin
ba55a7111e2bd6a02b9b46a80c63412f0fa7ff723bf2da3eb1536ea3a21e006b
pdf-font-stream PDF embedded font (sfnt) at offset 0x18E20 15856 bytes