Malicious PDF — malware analysis report

Static analysis result for SHA-256 210905cd5a7ef286…

MALICIOUS

PDF

49.2 KB Created: 2020-08-24 03:14:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3d31009a7c8795065636117a9a981459 SHA-1: d3c984a05dba0335474f812bb591669afa1ec072 SHA-256: 210905cd5a7ef28680f3476ff1625d4032928e396481623e3b6090bb164a3d58
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with a critical heuristic firing for PDF_SEO_LINK_FARM indicating a mass external link farm. One of these links, 'https://ttraff.cc/pify?keyword=format+code+html', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary purpose is to redirect users to malicious infrastructure.

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.cc/pify?keyword=format+code+html
    • http://files.michelledmeacham.com/uploads/1/3/1/3/131378943/lofuporitifem.pdf
    • http://piribag.brynsion.org/uploads/1/3/0/8/130813780/55526e45e2030.pdf
    • http://pomid.rivendellschool.com/uploads/1/3/1/6/131607095/sojemajarut.pdf
    • http://zumezumo.mosaico.ch/uploads/1/3/1/3/131380213/3b4214529aa3a0.pdf
    • http://bovofev.nbblackhistorysociety.org/uploads/1/3/1/3/131383839/xufipu_jowufagodedot_numod_xatunalotudimet.pdf
    • https://cdn.shopify.com/s/files/1/0432/3803/1518/files/kotisuw.pdf
    • https://cdn.shopify.com/s/files/1/0429/8424/3351/files/13177804817.pdf
    • https://cdn.shopify.com/s/files/1/0437/8276/6750/files/81301806831.pdf
    • https://cdn.shopify.com/s/files/1/0462/7254/4917/files/lepuvifumikikuzomolig.pdf
    • https://cdn.shopify.com/s/files/1/0434/6016/5797/files/novogokumodevafid.pdf
    • https://cdn.shopify.com/s/files/1/0432/6942/3269/files/1779259654.pdf
    • https://cdn.shopify.com/s/files/1/0429/4007/2092/files/94640204228.pdf
    • https://cdn.shopify.com/s/files/1/0433/5733/9813/files/cisco_ccna_lab_workbook_200_120.pdf
    • https://cdn.shopify.com/s/files/1/0437/6769/3474/files/zefulasikazos.pdf
    • https://cdn.shopify.com/s/files/1/0435/1868/9432/files/awana_theme_song_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0457/4599/5932/files/76893997868.pdf
    • https://cdn.shopify.com/s/files/1/0430/9775/1709/files/weekly_meal_planner_with_grocery_list.pdf
    • https://cdn.shopify.com/s/files/1/0438/8392/1563/files/11537466471.pdf
    • https://cdn.shopify.com/s/files/1/0433/8827/2807/files/56190017913.pdf
    • https://cdn.shopify.com/s/files/1/0431/0512/4516/files/rigogajusaj.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_off0000682e.bin
99e347119fca23f447aa75cd8a8f9016855070be3cb9288e9f6c4923692790f5
pdf-font-stream PDF embedded font (sfnt) at offset 0x682E 4956 bytes
font_01_sfnt_off000078d6.bin
f48f5f7e9980a01e6d2a3f304ba4514e31eea9621e78ebcc6310eb210d7d628e
pdf-font-stream PDF embedded font (sfnt) at offset 0x78D6 22632 bytes