Malicious PDF — malware analysis report

Static analysis result for SHA-256 b57ba707566214f7…

MALICIOUS

PDF

45.6 KB Created: 2020-09-17 02:20:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 778293455e4422b2a34a12351d5ba0fb SHA-1: 927fbfcbc266637a134bd5985ab0981883034b1f SHA-256: b57ba707566214f7a0019bc4739375ff9428b133484123dcf6fcc38ec4cd5ffe
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 link farm. One of the primary links directs to a known malicious redirector, 'ttraff.link', which is likely used to obscure the final destination. The document body, though heavily obfuscated, contains references to the 'stickam app for iphone' and the malicious URLs, suggesting a lure to potentially malicious content or phishing pages. No scripts were extracted from this sample.

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.link/wix?keyword=stickam+app+for+iphone
    • http://zebikit.bankier.co/uploads/1/3/0/9/130969644/legikebidolix-suvidelewa-diwamik.pdf
    • http://files.ormsbyguitars.com/uploads/1/3/1/6/131606819/kizixazino.pdf
    • http://vuxopad.medtechwearables.com/uploads/1/3/1/3/131379730/7769098.pdf
    • http://files.andrealimauro.com/uploads/1/3/1/4/131407423/964bdc984c.pdf
    • http://norevukor.newageofheroes.com/uploads/1/3/1/3/131383839/wedeveso.pdf
    • http://files.stchristophersnetballwa.com/uploads/1/3/2/8/132814791/pajisu.pdf
    • http://files.mi-sheffield.com/uploads/1/3/1/6/131606368/niludavifek_rerodotite.pdf
    • http://lozoruna.openbookseries.com/uploads/1/3/0/8/130874429/xobezovofoja.pdf
    • https://6e7e776b-753c-4b3a-a84d-4086bf3fbb55.filesusr.com/ugd/d99ef3_3297ab2e7c0e4a3f951e6e4ce58fb5f0.pdf?index=true
    • https://ffdf500a-0edd-4152-a7ba-1dd489b5b662.filesusr.com/ugd/55e2c6_d69d564121374b0f9258c7d58f0c3940.pdf?index=true
    • https://8d4f8721-9b8e-4d79-8193-4f6fdd620c93.filesusr.com/ugd/3d0627_a56baf3f4da34c68bba1b74fbb0d6e12.pdf?index=true
    • https://50529b55-12fe-402d-8754-e017fdeb2bfd.filesusr.com/ugd/4f270c_574a10079f5b4d18a7400303e2f342e2.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0435/5067/1007/files/wojarumaxubexizal.pdf
    • https://cdn.shopify.com/s/files/1/0431/0374/8263/files/mathematics_formula_list.pdf
    • https://cdn.shopify.com/s/files/1/0431/3595/9191/files/nuzowix.pdf
    • https://cdn.shopify.com/s/files/1/0431/6463/1195/files/xetifaw.pdf
    • https://cdn.shopify.com/s/files/1/0436/0699/9203/files/algorithm_c_sedgewick.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b31.bin
2f32373152b86590eb5c993bf8dbb57d20fc33770b92bc1ec6b5fd985d660553		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B31 2828 bytes
font_01_sfnt_off0000653a.bin
04217e7bbb7983f43bc02f608e1d7d0e90f6a2394fe07f1a4fdde3e1c9952754		 pdf-font-stream PDF embedded font (sfnt) at offset 0x653A 5000 bytes
font_02_sfnt_off00007607.bin
b574e654236b0a869dd6ba683e50bccf4e826f9f19bd76142ddc49b80c3ddc59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7607 10740 bytes
font_03_sfnt_off00009aba.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9ABA 4324 bytes

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