Malicious PDF — malware analysis report

Static analysis result for SHA-256 057ac76762190eb3…

MALICIOUS

PDF

40.1 KB Created: 2020-08-28 14:14:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e0885316d68398fe93c831d49b96a3ec SHA-1: 5974d716a0c6d3d6261a935c3970d484136db239 SHA-256: 057ac76762190eb3bac679740ce9c3cd4d25f9eb2380a32586687c1dd90d9b60
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with a critical heuristic identifying it as a link farm pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be part of this malicious redirection scheme. The ML classifier also strongly indicated maliciousness.

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=programmation+telecommande+wayne+dal In PDF document text
    • http://files.austinchubb.com/uploads/1/3/1/6/131606493/3217412.pdfIn PDF document text
    • http://files.tantricshadowcoaching.com/uploads/1/3/0/8/130813988/6143427.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4691/0624/files/vubuditosix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/kasetepanereretadog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0466/4190/5829/files/hillsong_pursue_chords.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4072/6431/files/92488840056.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0046/2503/files/67191598099.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9850/5369/files/bodufesafitejufowuji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4484/8295/files/95687443482.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4971/1781/files/auma_multi_turn_actuators.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9301/6222/files/kiwatusuxoxurar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7142/9016/files/54775814122.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6903/7982/files/katasifuwemuvivusajaza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7047/9768/files/noxikofumug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/4438/9283/files/homelite_chainsaw_manual_oiler.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005eb4.bin
4e2306bf446051f25bc701d880e849debea2de7d0f9cce482db3bfff1bc84faf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EB4 5276 bytes
font_01_sfnt_off00007096.bin
09ae446290dbb73bf5d29e87c30c0a1f288ad71e8ae91b8707292e9ba131240e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7096 10128 bytes

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