Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6b3a81c91960c7a…

MALICIOUS

PDF

50.2 KB Created: 2020-08-03 21:29:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e5b98cb8c14498cd94da14ba7e86a7a3 SHA-1: 0ababb21a53c753935098c2d590d6f3d18112ac1 SHA-256: a6b3a81c91960c7aefed0efdc9067fd4c238b718e7431e00d8e8c894dc9261c3
130 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of the primary links, 'https://ttraff.com/wb?keyword=discharge%20planning%20pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'discharge planning pdf' and mentions urgency, aligning with a phishing or credential harvesting lure. No scripts were extracted, but the PDF structure and embedded links strongly suggest a malicious intent to redirect the user to a harmful site.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.com/wb?keyword=discharge%20planning%20pdf
    • http://files.satillariverkeeper.org/uploads/1/3/0/7/130739201/7292221.pdf
    • http://files.thelumbrosos.com/uploads/1/3/0/7/130775108/bunexaziwozun_sixejitilazemag.pdf
    • http://files.augustapickleball.org/uploads/1/3/1/6/131636941/zuluja.pdf
    • http://files.labeventing.com/uploads/1/3/1/4/131406086/subunen.pdf
    • http://files.andersonoverheaddoors.com/uploads/1/3/2/7/132740249/pezimujuxizeverewo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0371/5489/files/23933018660.pdf
    • https://cdn.shopify.com/s/files/1/0434/4990/9415/files/mewafojebijivudaborez.pdf
    • https://cdn.shopify.com/s/files/1/0430/7773/0464/files/49416973437.pdf
    • https://cdn.shopify.com/s/files/1/0431/2665/3079/files/65239581378.pdf
    • https://cdn.shopify.com/s/files/1/0433/0238/7867/files/nupagogugowemenukenu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0989/1742/files/77892107898.pdf
    • https://cdn.shopify.com/s/files/1/0437/8161/9873/files/74841784254.pdf
    • https://cdn.shopify.com/s/files/1/0432/8954/2809/files/53641638107.pdf
    • https://cdn.shopify.com/s/files/1/0431/5214/6586/files/tekotafunilovabisukedese.pdf
    • https://cdn.shopify.com/s/files/1/0437/2755/2661/files/vapomepabudegode.pdf
    • https://cdn.shopify.com/s/files/1/0434/8893/6102/files/1088874300.pdf
    • https://cdn.shopify.com/s/files/1/0431/3438/6332/files/97448103294.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zejakepujubuk.pdf
    • https://cdn.shopify.com/s/files/1/0431/2186/8960/files/welav.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_off00008611.bin
c837a6944a328ce5d5db170522eee87050df37e863b8622059a90661b6764a81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8611 5416 bytes
font_01_sfnt_off00009880.bin
6b1ea01136ff72723cc202fe0e9bb701dc51d56f27962bb664089d758536bbbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9880 10292 bytes

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