Malicious PDF — malware analysis report

Static analysis result for SHA-256 9185a5d676177162…

MALICIOUS

PDF

37.4 KB Created: 2020-08-05 07:22:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7ac17abf46e0f3f024d9a4509e28b60b SHA-1: cb2742d8f1204315e73f81dcdd7965a9143ff347 SHA-256: 9185a5d67617716274f6b6a9f288481df6c83d680dcdd8800b1cd572afb95d8c
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, identified as a 'PDF SEO Link Farm'. One of these links, 'https://ttraff.cc/pify?keyword=sanitary+pipe+fittings+pdf', points to a known malicious redirector. The document body itself is heavily obfuscated but appears to contain the same lure text and URL. This suggests the primary goal is to redirect users to malicious infrastructure.

Heuristics 3

  • 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.
  • 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=sanitary+pipe+fittings+pdf
    • http://files.paulsugarfoundation.com/uploads/1/3/1/3/131380177/8386646.pdf
    • http://files.lightbringerlabs.com/uploads/1/3/1/3/131398258/ganutuvapom.pdf
    • http://files.divinesoulcenter.com/uploads/1/3/1/6/131608037/rinazekivepa.pdf
    • http://files.amyjlane-instructional.com/uploads/1/3/0/7/130775840/sipazejirepilexubu.pdf
    • http://files.alphachichico.org/uploads/1/3/0/7/130775953/nakuda-vuwoxola-paxeminafijod.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27055139941.pdf
    • https://cdn.shopify.com/s/files/1/0438/9378/4728/files/nirusenetunilazefewu.pdf
    • https://cdn.shopify.com/s/files/1/0436/0699/9203/files/tenuzixaduk.pdf
    • https://cdn.shopify.com/s/files/1/0431/2757/0596/files/84434726664.pdf
    • https://cdn.shopify.com/s/files/1/0430/3591/8489/files/81987374090.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5351/files/80122545769.pdf
    • https://cdn.shopify.com/s/files/1/0431/5054/0964/files/45351293440.pdf
    • https://cdn.shopify.com/s/files/1/0434/3732/6502/files/starters_cambridge_test_2020_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0431/9969/2958/files/formal_business_letter_format.pdf
    • https://cdn.shopify.com/s/files/1/0427/6604/1244/files/beguzeropusuwabemiwij.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/youtube_to_aac.pdf
    • https://cdn.shopify.com/s/files/1/0431/0456/7450/files/bookkeeping_accounting.pdf
    • https://cdn.shopify.com/s/files/1/0431/5165/5076/files/kixovopadel.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_off00005393.bin
2e23c976aade809db197f4db20ee9ee0f236d3af29fb828bdddb42812829fc1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5393 5384 bytes
font_01_sfnt_off000065f8.bin
62d79f4b6190132f143738d717e779f2fc6f304a84760cd979b967505a45bea7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65F8 10136 bytes

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