Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f580930c8492ac6…

MALICIOUS

PDF

50.7 KB Created: 2020-08-13 21:20:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f6a441ed04977721f905b1dfd5618fc2 SHA-1: 5636d30ad9477d022074aed0d86eed1c19802143 SHA-256: 6f580930c8492ac6687250299477403f57076f20407b19037e8631e57059fa73
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to malicious content. The document body, though heavily obfuscated, contains text related to a 'Bushnell laser rangefinder manual' and a URL that appears to be part of a link farm, suggesting a lure to a phishing or malware distribution site. The ML classifier 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=bushnell+laser+rangefinder+manual
    • http://zezekipu.coloradovideoartisans.com/uploads/1/3/0/7/130739629/5466982.pdf
    • http://files.gloucestershiregatewaytrust.org.uk/uploads/1/3/1/4/131437484/2750020.pdf
    • http://dofisexi.nkjones.com/uploads/1/3/1/3/131384260/1804e6c.pdf
    • http://finaxodo.metrowestmodelun.com/uploads/1/3/1/6/131637789/529723.pdf
    • http://files.wwidbq.com/uploads/1/3/0/8/130814066/kufurovudu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/2794/6904/files/77534189119.pdf
    • https://cdn.shopify.com/s/files/1/0438/3526/1085/files/from_genes_to_genomes_5th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/1307/0238/files/26882056010.pdf
    • https://cdn.shopify.com/s/files/1/0435/1731/3178/files/28182264421.pdf
    • https://cdn.shopify.com/s/files/1/0433/0625/4504/files/21118895354.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32296476761.pdf
    • https://cdn.shopify.com/s/files/1/0432/0421/4942/files/45083310128.pdf
    • https://cdn.shopify.com/s/files/1/0431/0577/9863/files/bacaan_yasin_latin.pdf
    • https://cdn.shopify.com/s/files/1/0433/4950/8250/files/83195921631.pdf
    • https://cdn.shopify.com/s/files/1/0431/3425/5265/files/84851287562.pdf
    • https://cdn.shopify.com/s/files/1/0430/5394/0887/files/kasemefowosi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007ae7.bin
cd4572ff8ee554f3cce73f7f6789cf7d2bd47199f1752ac14d227c42f3827ab1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AE7 5064 bytes
font_01_sfnt_off00008bdd.bin
0b28e6e2dd18d68a7f609c9bcf04cbcdd97a9642e20c879b45fd5f0ae671af87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BDD 10468 bytes
font_02_sfnt_off0000afab.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAFAB 4324 bytes

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