Malicious PDF — malware analysis report

Static analysis result for SHA-256 29011e437bf5257c…

MALICIOUS

PDF

46.8 KB Created: 2020-08-18 13:38:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 27783962f6ef484a4a6c7222b9c5937a SHA-1: 021c6dc8173898dca541c737fb0896a9762b6734 SHA-256: 29011e437bf5257c4d7afbd828f9540335853bc9ff47f535066de81242383aca
154 Risk Score

Malware Insights

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

The PDF contains a mass of external links, masquerading as a guided meditation script, to a redirector URL. The primary malicious URL identified is https://ttraff.cc/pify?keyword=guided+meditation+script+for+anger. The ML classifier strongly indicated maliciousness, and the presence of numerous links to external PDFs suggests a link farm or redirection strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=guided+meditation+script+for+anger
    • http://files.4seasonshomeinspection.com/uploads/1/3/1/4/131407737/mokatobesipad_konizolax.pdf
    • http://files.encounterweightloss.com/uploads/1/3/0/7/130739892/ea370985c52522.pdf
    • http://files.madlyeclectic.com/uploads/1/3/1/4/131483253/nuwitoduku_xafozovininu_lekilirox_navagad.pdf
    • http://files.fairdare.org/uploads/1/3/0/8/130873908/a99725247b86.pdf
    • http://files.verarey.com/uploads/1/3/1/4/131406582/091a98a45e.pdf
    • https://cdn.shopify.com/s/files/1/0431/8140/8416/files/89118298133.pdf
    • https://cdn.shopify.com/s/files/1/0430/2854/5693/files/97360928666.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/15138334831.pdf
    • https://cdn.shopify.com/s/files/1/0428/3439/5295/files/zokivu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6187/8687/files/suxasatepefakumepewanise.pdf
    • https://cdn.shopify.com/s/files/1/0429/7926/2615/files/zolowebofefipif.pdf
    • https://cdn.shopify.com/s/files/1/0433/3882/5887/files/kijoxesadefajepeboxiki.pdf
    • https://cdn.shopify.com/s/files/1/0430/0144/6551/files/bitlocker_for_mac_os_x.pdf
    • https://cdn.shopify.com/s/files/1/0429/6428/7651/files/inside_man_full_movie_300mb.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/rails_drop_table.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_off000079c9.bin
b78aabefe564030a87c35bea93ced478fddcec9a7f7e3dc45951586f8aaf79ca
pdf-font-stream PDF embedded font (sfnt) at offset 0x79C9 5472 bytes
font_01_sfnt_off00008c4e.bin
14f010d3dfb80c3b062fa07d6fd88a477296b48e66ce76ce1469157eba4b5cb7
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C4E 9880 bytes