Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcd7283b7fc14ae8…

MALICIOUS

PDF

39.7 KB Created: 2020-08-07 21:21:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 005a9f00140ecaadc3d215d4da50dbf7 SHA-1: 2db4c6be6d41af2590ed7c92ae125271c4315717 SHA-256: bcd7283b7fc14ae84ef75c9ed6ccc401baf8a90f6a61c43621b6fdacbe1619c5
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially corrupted, includes the URL 'https://ttraff.ru/pify?keyword=modern+high+end+valve+amplifiers+pdf', suggesting a lure to a malicious site. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm strategy to obscure the malicious redirector. No scripts were extracted from this sample.

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=modern+high+end+valve+amplifiers+pdf
    • http://files.lifeinthetumbleweeds.com/uploads/1/3/0/7/130775859/texobogoxemikuj-siwovupi.pdf
    • http://files.campfirequilts.com/uploads/1/3/2/8/132814276/fb44c161db710.pdf
    • http://files.anglersarsenaltx.com/uploads/1/3/1/8/131871725/9375144.pdf
    • http://files.talking-feet.com/uploads/1/3/1/3/131384424/6976648.pdf
    • https://cdn.shopify.com/s/files/1/0431/6394/3067/files/warigedadorusiropekezoz.pdf
    • https://cdn.shopify.com/s/files/1/0429/6451/7023/files/89309924562.pdf
    • https://cdn.shopify.com/s/files/1/0434/1779/6764/files/c_naming_conventions.pdf
    • https://cdn.shopify.com/s/files/1/0428/8996/9820/files/kindle_fire_hd_8_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/5543/0309/files/university_calculus_early_transcendentals_3rd_edition_free.pdf
    • https://cdn.shopify.com/s/files/1/0450/0822/4414/files/download_tucka_candyland.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31492874922.pdf
    • https://cdn.shopify.com/s/files/1/0445/4429/5076/files/null_pointer_borderlands_3.pdf
    • https://cdn.shopify.com/s/files/1/0439/6879/0686/files/29746878187.pdf
    • https://cdn.shopify.com/s/files/1/0430/1442/2677/files/51972928590.pdf
    • https://cdn.shopify.com/s/files/1/0433/4167/6694/files/perpajakan_brevet_a_dan_b.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/80084587067.pdf
    • https://cdn.shopify.com/s/files/1/0429/2476/9436/files/piwiriwofiguludisenili.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_off00004d93.bin
7c6208c95e953ca300197a8f2fea76ce6a06256f896157a9b6d6140957500022
pdf-font-stream PDF embedded font (sfnt) at offset 0x4D93 5228 bytes
font_01_sfnt_off00005f2f.bin
f670855929a980f2af09e50d0d425a7b8fd201081184e34ff21abc88836ff400
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F2F 10632 bytes
font_02_sfnt_off00008394.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x8394 4324 bytes