Malicious PDF — malware analysis report

Static analysis result for SHA-256 c46e1f6d2b4dc76d…

MALICIOUS

PDF

51.2 KB Created: 2020-08-19 00:02:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d1cc8b928d591621964238d9f2b935f SHA-1: cdb690f02abd1b23e35c788159b56e3a2825e80b SHA-256: c46e1f6d2b4dc76d9d1ff1ed562d5c3457a8474d3399ac5e0f94697eff8db64a
120 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to 'hr manager appraisal template' and the malicious URL itself. The PDF_SEO_LINK_FARM heuristic indicates the presence of numerous external links, suggesting a link farm or SEO poisoning tactic. The primary malicious IOC is the redirector URL.

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.com/pify?keyword=hr+manager+appraisal+template
    • http://files.dukechoir.org/uploads/1/3/1/3/131379037/kinubotuzavare-serure.pdf
    • http://files.designsbydiblankets.com/uploads/1/3/0/9/130970003/fewiled_vefotaro_jizomidu_nanebo.pdf
    • http://sivavav.wisefooltheater.com/uploads/1/3/1/4/131407995/7894278.pdf
    • http://files.pmgagolf.com/uploads/1/3/1/4/131452806/f0e4a0270318.pdf
    • http://files.onsfbay.com/uploads/1/3/1/0/131070375/3215495.pdf
    • https://cdn.shopify.com/s/files/1/0429/5458/8316/files/a_wrinkle_in_time_final_test.pdf
    • https://cdn.shopify.com/s/files/1/0432/4953/3088/files/puvuvesepodo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8513/6021/files/tizofufadul.pdf
    • https://cdn.shopify.com/s/files/1/0434/3808/0167/files/12000506519.pdf
    • https://cdn.shopify.com/s/files/1/0438/0049/4241/files/zixuzinekefisid.pdf
    • https://cdn.shopify.com/s/files/1/0435/1141/4939/files/20811075241.pdf
    • https://cdn.shopify.com/s/files/1/0432/8062/9913/files/astrology_for_beginners_bv_raman_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/1813/3405/files/53682694124.pdf
    • https://cdn.shopify.com/s/files/1/0429/1713/4502/files/forubemiwigofojepenowura.pdf
    • https://cdn.shopify.com/s/files/1/0431/6302/5557/files/perinatal_asphyxia_2020.pdf
    • https://cdn.shopify.com/s/files/1/0432/3124/8542/files/37237042536.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_off00008b86.bin
0b8b29a0e1669686f015846ee07780a0aacb75c8ca99a7c927733a97cbc1e6e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B86 5100 bytes
font_01_sfnt_off00009cb8.bin
81e19fa109e77b53e9de0d5ebc4723ba0f22514b01009860b0b8a3142826e241		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CB8 10420 bytes

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