Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4b99b70e7278db1…

MALICIOUS

PDF

45.2 KB Created: 2020-08-03 12:43:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c6af15a27f8cda560d1f0cf334be60d1 SHA-1: ed2b31fb6e92d0cf3df12587af7e17f8dcc54ac7 SHA-256: d4b99b70e7278db102671732581dae3bdfe58457c8bd07f60c2677dc7d8c72ac
140 Risk Score

Malware Insights

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

The PDF file contains a lure impersonating a document signing service, likely to trick the user into clicking a malicious link. The embedded link `https://ttraff.cc/pify?keyword=pdf+audio+reader+app+for+pc` is flagged as malicious. The document body also contains this URL, reinforcing the social engineering aspect of the attack. The file also contains a large number of links to Shopify, suggesting a link farm for SEO manipulation to increase visibility of the malicious content.

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.
  • Document signing service impersonation lure medium SE_DOCUSIGN_LURE
    Document impersonates DocuSign, Adobe Sign, or a similar signing service in a signing-request context
  • 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.cc/pify?keyword=pdf+audio+reader+app+for+pc
    • http://files.iguhep.org/uploads/1/3/0/7/130740211/9845957.pdf
    • http://files.positivitymagic.com/uploads/1/3/0/7/130738603/37b64e.pdf
    • http://files.airdriekarate.net/uploads/1/3/1/3/131379991/2462983.pdf
    • http://files.rebeccahaubner.com.au/uploads/1/3/1/8/131871614/9068884.pdf
    • https://cdn.shopify.com/s/files/1/0432/2784/0675/files/46111129926.pdf
    • https://cdn.shopify.com/s/files/1/0435/7849/1041/files/beretitiwofolikidid.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32823332632.pdf
    • https://cdn.shopify.com/s/files/1/0431/5067/2026/files/bafenuguxoxi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7664/9121/files/6218637425.pdf
    • https://cdn.shopify.com/s/files/1/0434/5351/3894/files/folapojopevuwesawex.pdf
    • https://cdn.shopify.com/s/files/1/0431/4605/1744/files/rofudemapedibuvatab.pdf
    • https://cdn.shopify.com/s/files/1/0440/7135/4533/files/aviation_far_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0430/3749/1357/files/pulugefe.pdf
    • https://cdn.shopify.com/s/files/1/0437/0631/9001/files/ximifuxese.pdf
    • https://cdn.shopify.com/s/files/1/0434/3382/0322/files/gozegab.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/
    • https://cdn.shopify.com/s/files/1/0

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007421.bin
359084ea8ff90a4f16c0b060a34f9861100dcc03e49b29d3280c1f6c4338f755		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7421 4940 bytes
font_01_sfnt_off00008505.bin
dc17612bfa0c89881b986af2181ede538f800459e2fa84e793614512394d12bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8505 10136 bytes

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