Malicious PDF — malware analysis report

Static analysis result for SHA-256 e18728ca52473d22…

MALICIOUS

PDF

45.8 KB Created: 2020-08-14 07:01:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 021e4e9d771d20e1455d5e629f2d80ae SHA-1: f9ab442e904a33f20f6dff4a2382b0f3d9f064f0 SHA-256: e18728ca52473d22d485261ac09cfab7bc1e692d1e6c22c5d3e7663d25728e0a
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.com, which is likely used to funnel victims to further malicious content. The document body, though heavily corrupted, contains the same URL and references a PDF related to grammar exercises, suggesting a lure. The presence of numerous other PDF links, many hosted on cdn.shopify.com, indicates a link farm strategy to improve SEO and distribute malicious content.

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/wb?keyword=haupts%C3%A4tze%20nebens%C3%A4tze%20%C3%BCbung%20pdf
    • http://files.showercamp.com/uploads/1/3/2/6/132681670/ximuvuvapufapi.pdf
    • http://files.bonnielynnsart.com/uploads/1/3/1/4/131407635/51edc10698da5b.pdf
    • http://files.dipconcaribbean.com/uploads/1/3/1/1/131164198/seloko-xolaxiba-zarujesizi.pdf
    • http://files.jazzwealth.com/uploads/1/3/2/6/132682974/moxelo.pdf
    • http://files.thornhillschool.org/uploads/1/3/0/9/130969150/7107fa3c.pdf
    • https://cdn.shopify.com/s/files/1/0429/1906/7815/files/97778860363.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pejodogidevetakuranuwa.pdf
    • https://cdn.shopify.com/s/files/1/0427/5827/5238/files/zuvazopoku.pdf
    • https://cdn.shopify.com/s/files/1/0427/6820/3942/files/guitar_basic_chords_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0437/4285/5319/files/english_grammar_books_in_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0434/9342/5316/files/vojono.pdf
    • https://cdn.shopify.com/s/files/1/0430/0495/2735/files/84567860857.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/80170273674.pdf
    • https://cdn.shopify.com/s/files/1/0431/4628/1122/files/tabuzanunajoruzananug.pdf
    • https://cdn.shopify.com/s/files/1/0431/3061/8020/files/95795153842.pdf
    • https://cdn.shopify.com/s/files/1/0434/2769/2695/files/8936804566.pdf
    • https://cdn.shopify.com/s/files/1/0447/6724/8535/files/vibrate_when_call_is_answered_note_9.pdf
    • https://cdn.shopify.com/s/files/1/0430/7196/3296/files/xojepuruk.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_off00006ca2.bin
8b965ca81e33beeef83631646d2894af0d860e8c7202850d54743a3518f5f611
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CA2 5588 bytes
font_01_sfnt_off00007ee7.bin
9d2f4e279a16c6c4b4d5d8e92cb7fabd93d3b6ffbeb85cb3a6770bf4d979b543
pdf-font-stream PDF embedded font (sfnt) at offset 0x7EE7 13384 bytes