Malicious PDF — malware analysis report

Static analysis result for SHA-256 93ffe9bf48e333aa…

MALICIOUS

PDF

41.0 KB Created: 2020-08-19 16:55:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae6edb9fa947a88e80a0efd30d92a40a SHA-1: 6b0312c8167de72a1566cf640e0b286b051ee1cd SHA-256: 93ffe9bf48e333aa2a48826b100aa082a446dba5125f25034d12be9784802c37
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document was flagged as malicious by an ML classifier and contains a large number of embedded links, indicating a link farm designed to redirect users. One of the primary links, https://ttraff.com/pify?keyword=journal+le+soir+d%2527+alg%25C3%25A9rie+en+pdf, points to known malicious redirector infrastructure. The document body contains garbled text but includes the same URLs found in the heuristics, reinforcing the malicious intent.

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.com/pify?keyword=journal+le+soir+d%2527+alg%25C3%25A9rie+en+pdf
    • http://romuwuxe.friendshipcenterlena.org/uploads/1/3/0/8/130813821/lewuzo-xutabawumeju-kemawagofe-larimovejulewav.pdf
    • http://files.breadstockandbarrel.com/uploads/1/3/0/8/130815303/d911f4b2f.pdf
    • http://pomoz.oectrading.co.za/uploads/1/3/1/4/131438539/rowowuwatiwu_jukudekazugi_gibojumudufev_vajarotuk.pdf
    • http://rarujinaf.objectpages.com/uploads/1/3/1/4/131453872/jogadug_falerun_visimuleve_fibawesazu.pdf
    • http://fuzadu.antoniosirianni.com/uploads/1/3/2/6/132681495/siwajidituvovudivali.pdf
    • https://cdn.shopify.com/s/files/1/0430/0744/3103/files/52975649310.pdf
    • https://cdn.shopify.com/s/files/1/0429/8627/4977/files/donadodebab.pdf
    • https://cdn.shopify.com/s/files/1/0439/3923/3960/files/biopsychosocial_spiritual_assessment.pdf
    • https://cdn.shopify.com/s/files/1/0437/4924/5082/files/zamisijozepu.pdf
    • https://cdn.shopify.com/s/files/1/0438/7209/2315/files/23916267397.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9680354999.pdf
    • https://cdn.shopify.com/s/files/1/0437/1061/1607/files/2413589107.pdf
    • https://cdn.shopify.com/s/files/1/0432/4196/3683/files/zirodirisuzoburo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3521/3479/files/buboguk.pdf
    • https://cdn.shopify.com/s/files/1/0432/8210/4478/files/toefl_ibt_test_questions.pdf
    • https://cdn.shopify.com/s/files/1/0429/6281/3084/files/blood_pressure_measurement_methods.pdf
    • https://cdn.shopify.com/s/files/1/0431/8127/7352/files/javamibexopob.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_off00005bad.bin
2df9430efb1d4bbecc56fa6d07efab496615c29d1eefbd98f3b8e15b4e873379
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BAD 5376 bytes
font_01_sfnt_off00006dc8.bin
254dd5c359290098ccf20bcdba56fdccebafec4bb5700728affbce89aff0b4ce
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DC8 12296 bytes