Malicious PDF — malware analysis report

Static analysis result for SHA-256 42c38e307230df3e…

MALICIOUS

PDF

48.8 KB Created: 2020-07-14 21:26:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 27b740d37a55f355f5ba8624d270c437 SHA-1: 73371281e59cf98af2098026c8dbf6e3f825d426 SHA-256: 42c38e307230df3e17415b8ff12938ede6effeede1bf7cc24f644202e7582288
154 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.ru'. This URL is presented within the document's content, suggesting a social engineering lure to direct users to malicious infrastructure. The ML classifier also strongly indicated maliciousness. No scripts were extracted, limiting the analysis of specific payload delivery mechanisms.

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.ru/wb?keyword=report%20mars%20pathfinder%20priority%20inversion%20problem.pdf
    • http://files.microneedleregulatory.org/uploads/1/3/0/9/130969209/giwuvizalapunemaf.pdf
    • http://files.jonbrittensofar.com/uploads/1/3/2/6/132681587/vibune_xareludakirokof_karixatisu.pdf
    • http://files.mystardustobservatory.com/uploads/1/3/2/6/132681698/c44caaac72fe.pdf
    • http://files.losaltosneighbors.com/uploads/1/3/1/0/131069812/9221943.pdf
    • http://files.jonbrittensofar.com/uploads/1/3/2/6/132681587/vibune_xar
    • https://cdn.shopify.com/s/files/1/0431/1370/9725/files/65047374984.pdf
    • https://cdn.shopify.com/s/files/1/0428/2354/9094/files/dofilefifozilo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6845/7113/files/8157928313.pdf
    • https://medidiri.files.wordpress.com/2020/07/wuraxado.pdf
    • https://madadov.files.wordpress.com/2020/06/73798605548.pdf
    • https://xagonete.files.wordpress.com/2020/07/24168607443.pdf
    • https://rizuxagojagu.files.wordpress.com/2020/06/34279180353.pdf
    • https://dunuludujeza.files.wordpress.com/2020/07/wokavumatuveremikaz.pdf
    • https://cdn.shopify.com/s/files/1/0432/8026/9477/files/bogufegigug.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84312174386.pdf
    • https://cdn.shopify.com/s/files/1/0428/6965/3663/files/nuguguposorak.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/2857609843.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/68905528383.pdf
    • https://cdn.shopify.com/s/files/1/0431/1482/3844/files/figumogoxemenoxas.pdf
    • https://cdn.shopify.com/s/files/1/0428/4357/0343/files/fodusidizemewisuduzax.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007f98.bin
84624d6d90c074873d6495979690b5a5944abadee0480a4ac496243cc617b764		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F98 5408 bytes
font_01_sfnt_off000091da.bin
f7e32589e2b6b97cefc6480ba6a794010f4e9ba949f08850cc57d759662420af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91DA 10420 bytes

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