Malicious PDF — malware analysis report

Static analysis result for SHA-256 34a72decdf9f9bcb…

MALICIOUS

PDF

55.4 KB Created: 2020-08-05 04:47:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f647437c39a7e87fa85812479898f2b7 SHA-1: 418854b00753558cde74dd7b4dbef2e8d665d018 SHA-256: 34a72decdf9f9bcb20f4b8e25a743a856403152226f8acfb984af087e761523f
128 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to Shopify domains hosting PDF files, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is likely the primary malicious payload delivery mechanism. The document body also contains text related to downloading Adobe Acrobat Reader, further supporting the lure of a download button to mask the malicious link.

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=adobe+acrobat+reader+dc+edit+pdf+free
    • http://files.hubcaphobbies.com/uploads/1/3/1/3/131398374/simutigesen.pdf
    • http://files.albertawinds.ca/uploads/1/3/2/6/132681938/didodada-sivato-mobope.pdf
    • http://files.lknailsandbeauty.co.uk/uploads/1/3/1/4/131454916/rawuramofopefelexux.pdf
    • http://files.elotw.com/uploads/1/3/1/4/131452887/0618fadc8b67.pdf
    • http://files.goldensteincattery.com/uploads/1/3/1/4/131453399/mefagu_forez_mabonudupofani.pdf
    • https://cdn.shopify.com/s/files/1/0430/4375/0049/files/1878296064.pdf
    • https://cdn.shopify.com/s/files/1/0435/3143/6186/files/13869469823.pdf
    • https://cdn.shopify.com/s/files/1/0429/5992/9503/files/10893293869.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0504/files/wopojaf.pdf
    • https://cdn.shopify.com/s/files/1/0432/2630/0575/files/92143805556.pdf
    • https://cdn.shopify.com/s/files/1/0437/2702/8375/files/cub_cadet_gt1554.pdf
    • https://cdn.shopify.com/s/files/1/0437/6435/1130/files/75886185458.pdf
    • https://cdn.shopify.com/s/files/1/0427/5427/7532/files/widoropirolu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4475/6901/files/rexusapujeroxepizogafi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9276/2006/files/4104498915.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063c6.bin
51b92362ee6b3fb63d3f7d68c4b13c2f9cc452394fb92dd84e5e7f18aa2189e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63C6 5236 bytes
font_01_sfnt_off00007631.bin
d3146016e787bb56748f7b135b9a07bd3831d0524ff9d7bdf1899d2a23a6da32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7631 4752 bytes
font_02_sfnt_off00008665.bin
22c784d95e4c4dd0705e200d1a05594cfc30916888c689030d3724355ba64037		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8665 10152 bytes
font_03_sfnt_off0000a959.bin
a24b379294965881213f6bc3e9db9f5314a2d8a06b10cd027b2e5f3c9ddd95e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA959 16488 bytes
font_04_sfnt_off0000bfe7.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBFE7 4324 bytes

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