Malicious PDF — malware analysis report

Static analysis result for SHA-256 3746b75d878366b1…

MALICIOUS

PDF

41.6 KB Created: 2020-08-23 08:09:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd05577a02674890f31a8aae7f4f8ccd SHA-1: d44ff24d46e1d79662d0c6f6376a5eb0955fee82 SHA-256: 3746b75d878366b149d9e085aeff3454b70a7acfab1332cc3cc4da1be4036f6d
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with one critical heuristic identifying a link to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'arbeitsschutzgesetz pdf', suggesting a lure to trick users into clicking the malicious links. The presence of a large number of external PDF links also indicates a link farm, likely for SEO manipulation or to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=arbeitsschutzgesetz%2528+arbschg+pdf
    • http://guwuwipo.thegauge.us/uploads/1/3/0/7/130775388/e7e5666942.pdf
    • http://files.markbrasuell.com/uploads/1/3/2/6/132682168/lidukal.pdf
    • https://cdn.shopify.com/s/files/1/0433/4891/8440/files/vikizikupevikurak.pdf
    • https://cdn.shopify.com/s/files/1/0434/1320/9246/files/11218040595.pdf
    • https://cdn.shopify.com/s/files/1/0438/0655/6320/files/23551627444.pdf
    • https://cdn.shopify.com/s/files/1/0430/4994/3202/files/gubaf.pdf
    • https://cdn.shopify.com/s/files/1/0438/1035/7405/files/dubininizarozusofux.pdf
    • https://cdn.shopify.com/s/files/1/0433/2496/5019/files/mcquarrie_statistical_mechanics_solutions_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/5665/0650/files/javascript_remove_duplicates_from_array.pdf
    • https://cdn.shopify.com/s/files/1/0431/6109/2245/files/23078487514.pdf
    • https://cdn.shopify.com/s/files/1/0432/4032/5282/files/ccds_exam_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/5702/9019/files/fufezonimar.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_off00005f7f.bin
c8f54ad10f4a47ded92af1bd16d0280944c41107651e81730730558c7be6436d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F7F 5644 bytes
font_01_sfnt_off000072bb.bin
9a34b56830088ce87556da50d2473a359850d9e13c7fdb65962719dcc798d816		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72BB 11484 bytes

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