Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1cc85705fed403a…

MALICIOUS

PDF

41.3 KB Created: 2020-08-07 15:21:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 007a8315e8830148eabd7ddf32a5ac32 SHA-1: 219e00c05027379f33f0a73facf3f4835f0963e7 SHA-256: a1cc85705fed403ae146011281d8dc4fe6c6c5cd209903a165152a5a27c5262e
168 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including one to a known malicious redirector at ttraff.com, disguised as a utility bill template. This pattern is indicative of a phishing or credential harvesting attempt, or potentially a lure for a malware download. The heuristic firings strongly support a malicious redirector and a payment redirection lure, suggesting the document's purpose is to trick the user into clicking the malicious link.

Heuristics 5

  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/pify?keyword=pdf+blank+utility+bill+template
    • http://files.shout4joy.net/uploads/1/3/0/7/130740055/femofapulekosuk.pdf
    • http://files.stnickskenosha.org/uploads/1/3/1/8/131856277/dcd5eccc4e99d.pdf
    • http://files.popcornkiwi.com/uploads/1/3/1/0/131070872/xoruzubumim_napebulev_bafusatabedaga.pdf
    • http://files.geditorial.com/uploads/1/3/1/1/131163666/jabof.pdf
    • https://cdn.shopify.com/s/files/1/0438/3444/1885/files/xokasubuxofopunejitememej.pdf
    • https://cdn.shopify.com/s/files/1/0433/6720/2974/files/joboxosatunanikapote.pdf
    • https://cdn.shopify.com/s/files/1/0431/3769/5895/files/zasofuzukusolonalar.pdf
    • https://cdn.shopify.com/s/files/1/0429/3787/6639/files/algebra_questions_and_answers_for_grade_7.pdf
    • https://cdn.shopify.com/s/files/1/0435/3651/5224/files/wusarikexakeguwobipaxa.pdf
    • https://cdn.shopify.com/s/files/1/0437/9839/7085/files/57417162234.pdf
    • https://cdn.shopify.com/s/files/1/0432/6119/8491/files/77662480919.pdf
    • https://cdn.shopify.com/s/files/1/0429/0812/3303/files/mebibozimokelopepunewo.pdf
    • https://cdn.shopify.com/s/files/1/0434/5036/8152/files/peguzu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4087/4408/files/dawanobopakis.pdf
    • https://cdn.shopify.com/s/files/1/0433/9043/5493/files/23293310554.pdf
    • https://cdn.shopify.com/s/files/1/0435/5319/4133/files/makalah_sejarah_agama_hindu.pdf
    • https://cdn.shopify.com/s/files/1/0440/1017/6662/files/roxaduvinuxog.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/95509007145.pdf
    • https://cdn.shopify.com/s/files/1/0427/6181/4172/files/jafavamakoravugeginutis.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_off0000643e.bin
f52026371bee80b45ac28420a9cbc079c5ecbb53d1e6ae85fe1d296657c56975		 pdf-font-stream PDF embedded font (sfnt) at offset 0x643E 5220 bytes
font_01_sfnt_off000075ff.bin
8110e89224037e1d1318296bf0517f0eab1a4522185f88f1e993a7e8779662f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75FF 10192 bytes

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