Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a9244fb957e1529…

MALICIOUS

PDF

36.1 KB Created: 2020-08-11 01:13:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b142d6a11820c6a3c6636766bc78a60c SHA-1: 44d7a3b3bc623b836f2b22526a9c3c5cfbef42e6 SHA-256: 8a9244fb957e15292724896d0df49a4e28fd3bb96cd099f74dcfa8cb67bffe6d
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external links, suggesting a link farm for SEO manipulation or malware distribution. The primary malicious URL identified is https://ttraff.cc/pify?keyword=algorithme+avanc%25C3%25A9+exercices+corrig%25C3%25A9s+pdf, which is known to redirect to malicious infrastructure. The document body itself is largely garbled but contains references to the URL and the file's purported topic, 'Algorithme avancé exercices corrigés pdf'. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=algorithme+avanc%25C3%25A9+exercices+corrig%25C3%25A9s+pdf
    • http://files.sarahsimmonssings.com/uploads/1/3/1/0/131070291/00c9d.pdf
    • http://files.operationfreedomdogs.com/uploads/1/3/0/9/130969967/mibaxefukeve.pdf
    • http://files.apg-ga.us/uploads/1/3/0/8/130873822/dalejabive-nolixib.pdf
    • http://files.stjohnsgolfcourse.com/uploads/1/3/2/6/132695195/fd869a33e.pdf
    • http://files.battlefield4.org/uploads/1/3/2/6/132682882/934164c88c.pdf
    • https://cdn.shopify.com/s/files/1/0437/6412/1757/files/moment_area_method.pdf
    • https://cdn.shopify.com/s/files/1/0430/5197/4818/files/sikosuxalixur.pdf
    • https://cdn.shopify.com/s/files/1/0428/3134/7868/files/56882046253.pdf
    • https://cdn.shopify.com/s/files/1/0432/4248/7972/files/gozewugiwizovananujufab.pdf
    • https://cdn.shopify.com/s/files/1/0432/3944/0543/files/32560738689.pdf
    • https://cdn.shopify.com/s/files/1/0432/0080/7070/files/48761727257.pdf
    • https://cdn.shopify.com/s/files/1/0432/0804/8808/files/71623901378.pdf
    • https://cdn.shopify.com/s/files/1/0433/3728/5797/files/demole.pdf
    • https://cdn.shopify.com/s/files/1/0431/9690/7678/files/27106531958.pdf
    • https://cdn.shopify.com/s/files/1/0431/7688/6431/files/3038415640.pdf
    • https://cdn.shopify.com/s/files/1/0428/3373/9932/files/mawikatezipejarelosabudor.pdf
    • https://cdn.shopify.com/s/files/1/0431/7403/5607/files/dipakagojodobozutonu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8722/4213/files/mutisovesavetofus.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_off00004ac0.bin
42356ed0206c920cf8f4c8e7bf4bef1df7dff51d482a9f931dec5d5650a9577b
pdf-font-stream PDF embedded font (sfnt) at offset 0x4AC0 5828 bytes
font_01_sfnt_off00005e35.bin
31795a70fcf397a6890ec971f05917c0b3c868e9801408916b8ba8eb81f17ec0
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E35 10964 bytes