Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa808532586e4540…

MALICIOUS

PDF

46.1 KB Created: 2020-08-18 19:41:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ecf6f7091c1589ee31d07c5ccdb183d SHA-1: acdaa546c769afb6067e6bbe6c1d7dde8b8d3676 SHA-256: aa808532586e454072efbd23d13163372d40754158f914f57aa0ea0fc5d03d4f
128 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing for PDF_SEO_LINK_FARM indicating a link farm. One of these links, ttraff.ru, is flagged as a malicious redirector. The document body also contains a call-to-action phrase, suggesting a lure to encourage user interaction with the malicious links. No scripts were extracted from this sample.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=commendable+work+performance
    • http://files.matterbotattica.com/uploads/1/3/2/6/132681901/c586d0a7.pdf
    • http://jifebuguk.widhalmcustomhomes.com/uploads/1/3/0/8/130813988/febugidetagizo_nowow_mewopigatedidob_wopuxan.pdf
    • http://sarijo.jericosoundsystems.com/uploads/1/3/0/9/130969332/7231214.pdf
    • http://files.businessbcs.com/uploads/1/3/2/7/132740343/e9c81eaa854.pdf
    • https://cdn.shopify.com/s/files/1/0431/9975/8497/files/vagori.pdf
    • https://cdn.shopify.com/s/files/1/0435/1367/5930/files/juvapod.pdf
    • https://cdn.shopify.com/s/files/1/0431/7659/1509/files/ashrae_standards_62._1.pdf
    • https://cdn.shopify.com/s/files/1/0433/0576/2974/files/kadaxuzana.pdf
    • https://cdn.shopify.com/s/files/1/0441/3623/5160/files/tasesopiforujudasapu.pdf
    • https://cdn.shopify.com/s/files/1/0430/2707/1130/files/javubasowajixoro.pdf
    • https://cdn.shopify.com/s/files/1/0436/4782/8133/files/nebesuw.pdf
    • https://cdn.shopify.com/s/files/1/0435/2147/4714/files/siwiwagutodolitedatafi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0256/8599/files/blacksmith_workshop.pdf
    • https://cdn.shopify.com/s/files/1/0431/7711/5812/files/20500222040.pdf
    • https://cdn.shopify.com/s/files/1/0428/5153/2963/files/general_affidavit_form_missouri.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_off000076a6.bin
4a5cfa522d106868325ab9ca181abebdf7664a7a1a5b46700aae16d6a96b5028		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76A6 5324 bytes
font_01_sfnt_off000088ba.bin
3289153d2a5513cbaff003d0807e0c7bda05a919b160ef4fc78a9e78d226fbbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88BA 10220 bytes

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