Malicious PDF — malware analysis report

Static analysis result for SHA-256 053967859f577223…

MALICIOUS

PDF

54.3 KB Created: 2020-07-31 13:11:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e5d26c69f2f58a55c51786464de773e7 SHA-1: 142f18528b4952b4ecf7930a186e267b29b1e582 SHA-256: 053967859f57722392627d53e3eadaab7774738e30200c20133cf83e1ee40285
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting an attempt to manipulate search engine results or direct users to malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=alzheimer+sintomas+y+tratamiento+pdf
    • http://files.npxcasting.com/uploads/1/3/0/7/130774968/minawodelavot_bikadosewinuko.pdf
    • http://files.thesilvergoddessjoanib.com/uploads/1/3/1/4/131453615/xisekopud.pdf
    • http://files.thelauramagner.com/uploads/1/3/1/4/131437834/5056048.pdf
    • http://files.graceandblessing.net/uploads/1/3/1/0/131070688/kejituja-xexifowano-bovix.pdf
    • http://files.dougzanderart.com/uploads/1/3/1/3/131398555/nudoboti.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bobidaxida.pdf
    • https://cdn.shopify.com/s/files/1/0431/5525/9560/files/66190538391.pdf
    • https://cdn.shopify.com/s/files/1/0434/8834/6262/files/80920023129.pdf
    • https://cdn.shopify.com/s/files/1/0432/9065/6936/files/22313320103.pdf
    • https://cdn.shopify.com/s/files/1/0430/9860/3669/files/38725654037.pdf
    • https://cdn.shopify.com/s/files/1/0432/6657/2452/files/74978959354.pdf
    • https://cdn.shopify.com/s/files/1/0430/4571/6129/files/kevulozatumuwuzobadaz.pdf
    • https://cdn.shopify.com/s/files/1/0434/0659/0106/files/68089112105.pdf
    • https://cdn.shopify.com/s/files/1/0432/2613/6743/files/67734007353.pdf
    • https://cdn.shopify.com/s/files/1/0429/9807/1449/files/nawuwepirojuxadimaxaxi.pdf
    • https://cdn.shopify.com/s/files/1/0434/3146/1016/files/11660313410.pdf
    • https://cdn.shopify.com/s/files/1/0427/8131/1132/files/wufulekidewexetu.pdf
    • https://cdn.shopify.com/s/files/1/0434/8385/7053/files/xiwirogofodorotufuxivumo.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009740.bin
0f2e9aa5cbcc178530585381fcdcfc10021da5ffcca7b34c6e528471d93dae34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9740 5208 bytes
font_01_sfnt_off0000a8d5.bin
c9ea7ebc328d95d3e892627a4a3437425aedc78b49fb8128b3285e25e64b0cd9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA8D5 10656 bytes

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