Malicious PDF — malware analysis report

Static analysis result for SHA-256 db7bbb9ec773e30f…

MALICIOUS

PDF

44.9 KB Created: 2020-08-09 14:28:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 314f53600e3b5fc41865c048bd020006 SHA-1: 375fcbd84201d13c7598aff5b4fa3dc754cb2791 SHA-256: db7bbb9ec773e30f4530e470f82d4a3cc4941105aed356f21fb4e4d430310739
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass of external links, including a critical link to a known malicious redirector at ttraff.com. The document body, though obfuscated, contains the same lure text and URLs, suggesting the primary purpose is to redirect the user to malicious content. No scripts were extracted from this sample.

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.com/pify?keyword=basic+anatomy+and+physiology+of+the+eye+pdf
    • http://files.limetreehomestaging.com/uploads/1/3/1/4/131406222/c15acec104a.pdf
    • http://files.morriscountypca.org/uploads/1/3/1/4/131483019/e6039ef.pdf
    • http://files.ddrncboa.com/uploads/1/3/0/7/130739375/pegubonojix.pdf
    • http://files.saratogamusicboosters.org/uploads/1/3/1/4/131452771/gekafaxabeg_gazaxokup_fotizopab_nanajojututavu.pdf
    • http://files.saratogamusicboosters.org/uploads/1/3/1/4/131452771/gekafaxabeg_gazaxokup_
    • https://cdn.shopify.com/s/files/1/0434/1596/1762/files/68721310406.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3098/files/49556001441.pdf
    • https://cdn.shopify.com/s/files/1/0436/1751/7731/files/allotments_act_1950.pdf
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/rodojav.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/99296573959.pdf
    • https://cdn.shopify.com/s/files/1/0427/7728/0671/files/xeveguwapotofa.pdf
    • https://cdn.shopify.com/s/files/1/0433/3161/6918/files/66560518429.pdf
    • https://cdn.shopify.com/s/files/1/0431/7754/1792/files/urban_sniper_2.pdf
    • https://cdn.shopify.com/s/files/1/0429/3538/6265/files/moxunanuwuvetemunidozezoz.pdf
    • https://cdn.shopify.com/s/files/1/0433/7978/5886/files/82969439465.pdf
    • https://cdn.shopify.com/s/files/1/0433/3705/6414/files/linewovonoxa.pdf
    • https://cdn.shopify.com/s/files/1/0428/0382/2755/files/ranifomusesojozon.pdf
    • https://cdn.shopify.com/s/files/1/0429/5180/3033/files/pumalorutokoxol.pdf
    • https://cdn.shopify.com/s/files/1/0429/9200/9365/files/57723821949.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_off00006d4a.bin
950183ff7c5e082e598c8e14874ff1c86b6eebc742d04f7c4dabecf4e9b9304f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D4A 5624 bytes
font_01_sfnt_off00008059.bin
7076bbc116206d05326fa925a8017a551a3e2669bbd160766daa96660968c2db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8059 10560 bytes

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