Malicious PDF — malware analysis report

Static analysis result for SHA-256 9069003e387e30e5…

MALICIOUS

PDF

40.5 KB Created: 2020-08-16 19:26:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a93821f261cbf8d59853cd5d31455bc3 SHA-1: 3c9cff24bd7be1bbfea0138973da6a93619a51c4 SHA-256: 9069003e387e30e537f65c14a0f3b73394b9b360dcd281b1dc89b4a38605c341
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely used to obscure the final malicious destination. The document body, though heavily obfuscated, contains the same URL and appears to be a lure related to 'biochemical engineering major information'. The presence of a PDF link farm heuristic further suggests a malicious intent to distribute links to potentially harmful content. 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.ru/pify?keyword=biochemical+engineering+major+information
    • http://jozitopeg.i2cafe.com/uploads/1/3/1/6/131606346/numavikexikob-dipizukum.pdf
    • http://files.sammycharytoniuk.com/uploads/1/3/0/8/130813054/1623169.pdf
    • https://cdn.shopify.com/s/files/1/0431/4297/1553/files/49976160627.pdf
    • https://cdn.shopify.com/s/files/1/0431/6217/3604/files/bupikogelulosisip.pdf
    • https://cdn.shopify.com/s/files/1/0430/3329/7058/files/gunigifog.pdf
    • https://cdn.shopify.com/s/files/1/0429/9885/7891/files/android_settings_put_secure_sysui_qs_tiles.pdf
    • https://cdn.shopify.com/s/files/1/0440/8688/6552/files/ebook_reader_fr_farbige.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31995481059.pdf
    • https://cdn.shopify.com/s/files/1/0431/4349/5842/files/low_carb_vegetarian_food_list.pdf
    • https://cdn.shopify.com/s/files/1/0438/9624/2331/files/calidad_definiciones.pdf
    • https://cdn.shopify.com/s/files/1/0430/3038/0698/files/81732831698.pdf
    • https://cdn.shopify.com/s/files/1/0448/5352/6690/files/ornamental_fish_farming_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/2571/0750/files/86421529557.pdf
    • https://cdn.shopify.com/s/files/1/0433/1926/3397/files/28501159073.pdf
    • https://cdn.shopify.com/s/files/1/0439/9710/2238/files/alternative_dispute_redressal_including_arbitration_act_bare_act.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_off00006089.bin
f55433d29a8c5d5e784f1f35293b9c0cf0fc05d725047b48129ec855e2f37150		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6089 5240 bytes
font_01_sfnt_off00007239.bin
6ce90f35463368022dd7fd55d34b20797803ba06640ceaa29421749b4b4c71a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7239 10268 bytes

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