Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e7997786e7c5bd9…

MALICIOUS

PDF

41.0 KB Created: 2020-08-07 07:55:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a433cf619d7e8932123130c646f1fae7 SHA-1: 7caa2e57a4fd577f52782698b29d3f8db1c05865 SHA-256: 8e7997786e7c5bd99ccabdb4ad3388d894a231e20dcb1eb8b621f5d48ba4a10e
150 Risk Score

Malware Insights

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

The PDF was flagged by a critical heuristic for containing a malicious redirector link and a large number of external PDF links, suggesting a link farm designed to distribute malicious content. The ML classifier also strongly indicated maliciousness. The document body contains the URL https://ttraff.ru/pify?keyword=carbon+cycle+pdf+notes, which is identified as a malicious redirector.

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=carbon+cycle+pdf+notes
    • http://files.hilarycoolidge.com/uploads/1/3/1/1/131164260/mozimitawivuw.pdf
    • http://files.masom.net/uploads/1/3/0/7/130740444/5742298.pdf
    • http://files.littleleafflutestore.com/uploads/1/3/2/6/132695829/689d6e200a704.pdf
    • http://files.cottagegardencraftworks.com/uploads/1/3/1/4/131438538/9179600.pdf
    • https://cdn.shopify.com/s/files/1/0434/8693/7253/files/fallout_4_railroad_quests.pdf
    • https://cdn.shopify.com/s/files/1/0431/6954/6395/files/shunting_yard_algorithm_java.pdf
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/23822266705.pdf
    • https://cdn.shopify.com/s/files/1/0431/8475/0743/files/63908029223.pdf
    • https://cdn.shopify.com/s/files/1/0431/4028/4583/files/juvoninugorileto.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27621352833.pdf
    • https://cdn.shopify.com/s/files/1/0438/0744/1053/files/headlights_eminem_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0429/9672/7961/files/inuyasha_episode_list.pdf
    • https://cdn.shopify.com/s/files/1/0432/7804/1244/files/the_vixen_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/6663/6953/files/66155258718.pdf
    • https://cdn.shopify.com/s/files/1/0428/6421/4175/files/strategic_brand_management_keller_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/3316/5986/files/mabavifoja.pdf
    • https://cdn.shopify.com/s/files/1/0432/5982/2244/files/household_budget_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0435/7927/7467/files/rodugonanirajizerotevenof.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_off00006309.bin
eff03f7e2e77ab6fa68e54adee81df8d30e26d6b1b3deb61263f0f25c3396842
pdf-font-stream PDF embedded font (sfnt) at offset 0x6309 5296 bytes
font_01_sfnt_off0000751b.bin
2a513273210b49131f8e308156070963d3e088761dffca831f38033877ff2672
pdf-font-stream PDF embedded font (sfnt) at offset 0x751B 10028 bytes