Malicious PDF — malware analysis report

Static analysis result for SHA-256 277b6580cbc36c26…

MALICIOUS

PDF

42.6 KB Created: 2020-08-30 00:04:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 789ef5a0df498183b2e95ec0e2d4532d SHA-1: a7c7baae5e93a794cff50729cad5644b8e3c70b9 SHA-256: 277b6580cbc36c2661ae1d8324a4b678824a6dac7e234d8a200e1f70482f8a97
140 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a lure referencing 'Quickbooks error 6190' and includes a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. This suggests a phishing or scam attempt. Additionally, the PDF acts as a link farm, embedding numerous external links, many hosted on Shopify, which is a tactic to obscure the malicious destination. The presence of a callback phishing lure further supports the malicious intent.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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/wix?keyword=quickbooks+error+6190
    • https://cdn.shopify.com/s/files/1/0433/8565/1358/files/penetrating_keratoplasty.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rixozuxixewu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9209/8724/files/32691660594.pdf
    • https://cdn.shopify.com/s/files/1/0431/7046/3912/files/sigijodi.pdf
    • https://cdn.shopify.com/s/files/1/0431/1023/6314/files/72196156240.pdf
    • https://cdn.shopify.com/s/files/1/0453/2440/2843/files/developmental_frame_of_reference_occupational_therapy.pdf
    • https://cdn.shopify.com/s/files/1/0430/7861/5189/files/vivunuviwodom.pdf
    • https://static.usrfiles.com/ugd/07625c_14ce128bafd443568cd6bc24dfb2ee18.pdf
    • https://static.usrfiles.com/ugd/b8c837_0378499d807e41d8b2a47aa2df882a6c.pdf
    • https://static.usrfiles.com/ugd/b8c837_7a9900ea248a4ee1b9f7bee44bbebd19.pdf
    • https://static.usrfiles.com/ugd/9c0842_6b8778cca1734933be11bb911363ff3c.pdf
    • https://static.usrfiles.com/ugd/1cfe37_b251186ec76540bfbe4ab7306a305090.pdf
    • https://static.usrfiles.com/ugd/b8c837_9457d1d0d431470e8844057789c5ded9.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_off00006649.bin
ef6f8496deac62787719f33888536b56e8966c1592f0a8ecb1ea53841dd2faca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6649 5320 bytes
font_01_sfnt_off0000786b.bin
0a421b4b2a4c65a108516040412b3a67abb508bd5b1836c210239c9e5b5f6b1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x786B 11072 bytes

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