Malicious PDF — malware analysis report

Static analysis result for SHA-256 553b8c5983d98506…

MALICIOUS

PDF

50.9 KB Created: 2020-08-04 20:19:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a95ef962d375b3461920ac3b26bd5e06 SHA-1: 708a844884a6afb18192d9dbb3d86dc1871adf89 SHA-256: 553b8c5983d98506818e88d5b1cae1a4f2eb8a9303d3fb53599446a39daabc4a
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This indicates the document is designed to lure users to a potentially harmful website. Additionally, a large number of embedded links were found, many pointing to Shopify domains, suggesting a link farm or SEO manipulation tactic to obscure the malicious redirect. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.com/pify?keyword=ejemplo+de+un+anteproyecto+de+investigacion+pdf
    • http://files.fryeins.com/uploads/1/3/1/3/131398347/8898428.pdf
    • http://files.claycountyhistoricalsocietyin.org/uploads/1/3/1/3/131380251/sivugeg.pdf
    • http://files.quillandpapercalligraphy.com/uploads/1/3/0/7/130776225/fopafosumabilino.pdf
    • https://cdn.shopify.com/s/files/1/0427/6856/4380/files/nufusawazopadedur.pdf
    • https://cdn.shopify.com/s/files/1/0434/3064/1826/files/52581397858.pdf
    • https://cdn.shopify.com/s/files/1/0427/9032/2342/files/averitt_bol.pdf
    • https://cdn.shopify.com/s/files/1/0438/4302/7104/files/23552396316.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/godikuka.pdf
    • https://cdn.shopify.com/s/files/1/0429/5180/3039/files/pitejefa.pdf
    • https://cdn.shopify.com/s/files/1/0430/9853/8151/files/31018514233.pdf
    • https://cdn.shopify.com/s/files/1/0436/9137/6794/files/zewuzaledaveselomasarisi.pdf
    • https://cdn.shopify.com/s/files/1/0434/2949/4933/files/zanugapu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9482/7418/files/simisu.pdf
    • https://cdn.shopify.com/s/files/1/0437/1392/1189/files/wasatch_softrip_7.pdf
    • https://cdn.shopify.com/s/files/1/0437/4098/7543/files/11503132568.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/
    • https://cdn.shopify.com/s/files/1/0429/9482/7418/files/simi

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000081ad.bin
4e70a6dbd47933799c5f50a6ca88502f57223b1411ec743faa45d0b3dcb36662		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81AD 5668 bytes
font_01_sfnt_off000094fb.bin
497298453c24c20d6f7e25858a29e1e09b2c9b11736dc54ee7449c230af350ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94FB 12276 bytes

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