Malicious PDF — malware analysis report

Static analysis result for SHA-256 83a38d8cfe09d17f…

MALICIOUS

PDF

37.5 KB Created: 2020-08-10 19:07:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d4e76f1ea4fa8384baf74a21d821a75 SHA-1: 4c786b8ce259ce6814e09986ca385abb4e89946a SHA-256: 83a38d8cfe09d17f7d32542bb50207961ced6d027c968d2cf9adb38fc4d18b96
120 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to domains associated with SEO link farms and redirectors. The primary malicious link, https://ttraff.ru/pify?keyword=physics+formulas+pdf+free+download, is designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, contains references to 'physics formulas pdf free download', indicating a lure to entice clicks.

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=physics+formulas+pdf+free+download
    • http://mogexaj.wss1sgradeib.com/uploads/1/3/2/6/132695569/ccac16093.pdf
    • http://rezote.cswithwhitlock.com/uploads/1/3/1/4/131407005/divakepokelejeginofu.pdf
    • http://files.thomfogartypresents.com/uploads/1/3/0/8/130874197/dixolikapuwori-vakirarobisoso.pdf
    • http://files.professionalpolishingtouch.com/uploads/1/3/1/1/131164002/soroj.pdf
    • http://files.csnoss.org/uploads/1/3/1/3/131379553/lejamabaloladuxu.pdf
    • https://cdn.shopify.com/s/files/1/0437/6035/3429/files/iphone_x_screenshot.pdf
    • https://cdn.shopify.com/s/files/1/0434/6265/6152/files/domino_s_pizza_menu_ireland.pdf
    • https://cdn.shopify.com/s/files/1/0440/4012/6614/files/2735232968.pdf
    • https://cdn.shopify.com/s/files/1/0435/5280/0920/files/wupupilumos.pdf
    • https://cdn.shopify.com/s/files/1/0431/2930/7296/files/40182839684.pdf
    • https://cdn.shopify.com/s/files/1/0434/2788/9302/files/wijirudixuzogul.pdf
    • https://cdn.shopify.com/s/files/1/0432/8495/5300/files/41384059851.pdf
    • https://cdn.shopify.com/s/files/1/0430/7881/1797/files/nba_max_contract_rules.pdf
    • https://cdn.shopify.com/s/files/1/0428/7578/1276/files/9714309184.pdf
    • https://cdn.shopify.com/s/files/1/0434/3640/8982/files/dewebesixar.pdf
    • https://cdn.shopify.com/s/files/1/0441/3915/1512/files/dalewawam.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_off000054af.bin
ca447d7ed8291f6e26fe74e8a8a545911a7214bf89d4ec8e2297b141e0e4371c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54AF 5592 bytes
font_01_sfnt_off00006793.bin
f8e68cde49acbfa3e6f298f13cb2b694a31fa9a0edd24c3e2e37ba9bddbcb972		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6793 9908 bytes

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