Malicious PDF — malware analysis report

Static analysis result for SHA-256 31753e0770edca18…

MALICIOUS

PDF

37.6 KB Created: 2020-08-14 23:41:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4858da4759bdb83464c5f81d6f2f6b3b SHA-1: 9eafffdc75c0aecce908e0f891d4fa2a8c091ae6 SHA-256: 31753e0770edca18590b2aafa3411e8ce721d9456b1b37b22542291997e9df64
140 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to a URL that appears to be part of a link farm. The document body, though partially corrupted, suggests a lure related to an 'installation manual'. Another heuristic indicates a callback phishing lure, consistent with the document asking the user to call a number in a support or billing context. The primary malicious IOC is the redirector URL, which likely leads to a phishing or scam page.

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.cc/pify?keyword=broseley+evolution+5+installation+manual
    • http://files.royaltytravel.us/uploads/1/3/1/6/131637169/piwemazaxenekabilizo.pdf
    • https://cdn.shopify.com/s/files/1/0433/3309/1480/files/97289871320.pdf
    • https://cdn.shopify.com/s/files/1/0438/6498/1664/files/learn_portuguese_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/9452/2523/files/mepijaligosogetodip.pdf
    • https://cdn.shopify.com/s/files/1/0431/9916/8673/files/vupisebazatunadaxa.pdf
    • https://cdn.shopify.com/s/files/1/0432/2839/7728/files/gelilur.pdf
    • https://cdn.shopify.com/s/files/1/0431/7754/1791/files/32642848743.pdf
    • https://cdn.shopify.com/s/files/1/0433/9970/8821/files/muzatimibafujufudidu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2881/5783/files/kaxagukawewosipikub.pdf
    • https://cdn.shopify.com/s/files/1/0454/7251/4206/files/68343522442.pdf
    • https://cdn.shopify.com/s/files/1/0431/6823/5675/files/67247358124.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mozesuseb.pdf
    • https://cdn.shopify.com/s/files/1/0430/4555/2290/files/babemimew.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/26225030347.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_off000054aa.bin
942d8877c94786433e34335173e44fbd4e7636735604bef7ad9955cb29ba5880		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54AA 5168 bytes
font_01_sfnt_off00006637.bin
e5875f0f8a0bc4f8aad39d468d590237578b53d18adda6ba59783e4bd829aa1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6637 10392 bytes

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