Malicious PDF — malware analysis report

Static analysis result for SHA-256 29d4e433f8ba24f0…

MALICIOUS

PDF

47.6 KB Created: 2020-08-19 15:27:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aad9188af4ee8282a89f82022e26683d SHA-1: 6ac0a190c49a0c1328e2fad077e842c4c50e0bb4 SHA-256: 29d4e433f8ba24f0acce398dd4af6889eb7fae64427e754a0e299cbff7e98246
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=adobe+pdf+full+bleed'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, including one to 'https://cdn.shopify.com/s/files/1/0438/3630/9666/files/fonupenekaj.pdf'. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the redirector URL.

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=adobe+pdf+full+bleed
    • http://kovijofow.schoolrockspartybox.org/uploads/1/3/1/3/131398455/4469710.pdf
    • http://files.rebekahrasmussen.com/uploads/1/3/1/4/131406518/4468810.pdf
    • http://files.liniger.com/uploads/1/3/1/4/131453252/f65b4.pdf
    • http://files.lancevictormoore.com/uploads/1/3/2/7/132741334/7240620.pdf
    • http://files.lifelovesco.com/uploads/1/3/0/7/130740429/sudovexagamowe.pdf
    • https://cdn.shopify.com/s/files/1/0438/3630/9666/files/fonupenekaj.pdf
    • https://cdn.shopify.com/s/files/1/0436/3059/2160/files/81298467077.pdf
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/gesizazodisifuwukazas.pdf
    • https://cdn.shopify.com/s/files/1/0432/7188/0870/files/fonivojipuk.pdf
    • https://cdn.shopify.com/s/files/1/0454/1965/9420/files/phonics_flashcards_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/4964/7261/files/81374065303.pdf
    • https://cdn.shopify.com/s/files/1/0429/0415/8364/files/adverb_phrases_and_clauses.pdf
    • https://cdn.shopify.com/s/files/1/0428/8688/9625/files/70472623105.pdf
    • https://cdn.shopify.com/s/files/1/0431/0961/3725/files/namibin.pdf
    • https://cdn.shopify.com/s/files/1/0438/1714/0386/files/adb_install_multiple_error_android_studio.pdf
    • https://cdn.shopify.com/s/files/1/0432/0994/9341/files/58367704857.pdf
    • https://cdn.shopify.com/s/files/1/0437/6231/9517/files/wukuwedikid.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_off00007227.bin
b68b532a8d6b59d350840740d213494399095eaf6ed9ed8daad9668d8863986f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7227 4328 bytes
font_01_sfnt_off000080dd.bin
844161495180b4bd5f575a1180211a5b52f9637c9c6d260ad96f060bfe42a039
pdf-font-stream PDF embedded font (sfnt) at offset 0x80DD 10052 bytes
font_02_sfnt_off0000a34e.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0xA34E 4324 bytes