Malicious PDF — malware analysis report

Static analysis result for SHA-256 68e54e564a033709…

MALICIOUS

PDF

46.0 KB Created: 2020-08-11 16:57:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00b71cfb1adfc2ff86da2d4cc5c7e0ab SHA-1: a396ad9b389334102ffeb13ef07b5114fb92f363 SHA-256: 68e54e564a033709887f73cd4572ef89a1985f4f703190c0399e4c7d13395ecc
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to what appears to be a link farm designed to mimic search results or document downloads. One critical heuristic identified a link to a known malicious redirector infrastructure, indicating a malicious intent to direct users to harmful 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/wb?keyword=world%20cup%202018%20schedule%20canada%20pdf
    • http://files.truerainbow.com/uploads/1/3/1/4/131452817/mowiwi-fomaje-tugenuvekukelez.pdf
    • http://figifa.rachelriley.net/uploads/1/3/0/8/130813108/zipadogo_jagenamedexe_takaleluw_jenekov.pdf
    • http://minipakej.mchenrymaltesepuppies.com/uploads/1/3/1/6/131637419/wufedaruba_jaxozud_fuwoxavajos.pdf
    • http://files.hagerbekel.org/uploads/1/3/0/7/130740011/1019250.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/7697/5768/files/strategic_thinking._download.pdf
    • https://cdn.shopify.com/s/files/1/0430/8772/4704/files/dumivesawaxuzeduxama.pdf
    • https://cdn.shopify.com/s/files/1/0440/7967/7590/files/uber_ride_history.pdf
    • https://cdn.shopify.com/s/files/1/0437/9040/1687/files/80360683671.pdf
    • https://cdn.shopify.com/s/files/1/0430/6590/1210/files/lotaboviba.pdf
    • https://cdn.shopify.com/s/files/1/0432/9462/1862/files/83820525196.pdf
    • https://cdn.shopify.com/s/files/1/0432/9455/6320/files/97485371189.pdf
    • https://cdn.shopify.com/s/files/1/0430/9581/8397/files/lirogi.pdf
    • https://cdn.shopify.com/s/files/1/0428/6706/4998/files/96469143342.pdf
    • https://cdn.shopify.com/s/files/1/0429/2254/1209/files/96823766656.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tizerosotusalasebix.pdf
    • https://cdn.shopify.com/s/files/1/0434/6255/7856/files/942769188.pdf
    • https://cdn.shopify.com/s/files/1/0433/7467/4083/files/zoxonobunivudagitajal.pdf
    • https://cdn.shopify.com/s/files/1/0430/3755/6899/files/97695925285.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_off000067e8.bin
76ab0bfa2ceaec6db87584febb73128ed6c32e512129c6249a5e57f99dec3d4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67E8 5776 bytes
font_01_sfnt_off00007ba3.bin
b3ac72b0318d7a86bfb1e0dc84a813b551a596f1ecdc84de966d6eb09d18e631		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BA3 15228 bytes

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