Malicious PDF — malware analysis report

Static analysis result for SHA-256 98a8e3d731819b33…

MALICIOUS

PDF

52.3 KB Created: 2020-08-07 15:54:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4acdd3dbdc41dc58a609d6e99795cab SHA-1: 9cbe2c16377567dc78b46264c18c681e6781a320 SHA-256: 98a8e3d731819b33149465620cbc09e8d98ab4b1dc81fbd8e9fb7642c65fe700
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded links pointing to other PDF files hosted on Shopify. One of these links, 'https://ttraff.com/pify?keyword=eclectic+paradigm+pdf', is flagged as a malicious redirector. This suggests a campaign to distribute malicious content or manipulate search results through a link farm. The ML classifier also strongly indicated maliciousness.

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=eclectic+paradigm+pdf
    • http://files.berglundvet.com/uploads/1/3/0/7/130776499/jarimukuko.pdf
    • http://files.longrangeacademy.com/uploads/1/3/2/7/132712306/d97286f6caef8.pdf
    • http://files.darius-music.com/uploads/1/3/0/7/130774969/4b6a435c813f26f.pdf
    • https://cdn.shopify.com/s/files/1/0431/5562/0006/files/guvodovonenafode.pdf
    • https://cdn.shopify.com/s/files/1/0437/7827/7525/files/pandas_dataframe_join.pdf
    • https://cdn.shopify.com/s/files/1/0432/8072/8224/files/69205466064.pdf
    • https://cdn.shopify.com/s/files/1/0432/9878/3382/files/kajewumiwofate.pdf
    • https://cdn.shopify.com/s/files/1/0439/7803/1262/files/parupegor.pdf
    • https://cdn.shopify.com/s/files/1/0438/4836/8288/files/67743155626.pdf
    • https://cdn.shopify.com/s/files/1/0429/1464/4127/files/dubuxuzugoti.pdf
    • https://cdn.shopify.com/s/files/1/0431/8022/8759/files/linux_mint_viewer.pdf
    • https://cdn.shopify.com/s/files/1/0430/0269/1743/files/stay_with_me_the_faces_tab.pdf
    • https://cdn.shopify.com/s/files/1/0431/9241/8468/files/lezepakelesotizev.pdf
    • https://cdn.shopify.com/s/files/1/0429/4836/2399/files/95739940148.pdf
    • https://cdn.shopify.com/s/files/1/0430/9906/2421/files/dovevosenawajezutogelon.pdf
    • https://cdn.shopify.com/s/files/1/0436/4537/0518/files/84964294544.pdf
    • https://cdn.shopify.com/s/files/1/0431/5525/9560/files/pominolumaxetekejavofar.pdf
    • https://cdn.shopify.com/s/files/1/0435/4641/1162/files/19568674849.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/
    • https://cdn.shopify.com/s/files/1/0431/9241/8468/files/lezepakelesot

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008276.bin
5dc73c9bbe096947987bb8c1a04f7b0bc78721c253864ef5a312f1d503a6c1d0
pdf-font-stream PDF embedded font (sfnt) at offset 0x8276 4824 bytes
font_01_sfnt_off000092e2.bin
8292409c6f1bcf6073819f6e8ef55b3310778885bd84ad7b3101ebefa66a6c4d
pdf-font-stream PDF embedded font (sfnt) at offset 0x92E2 10316 bytes
font_02_sfnt_off0000b60b.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0xB60B 4324 bytes