Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa1ebb0c7c6f14f1…

MALICIOUS

PDF

48.0 KB Created: 2020-08-14 04:53:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a91a51c93ba5ae43b299aea6cf6aa028 SHA-1: e420bf61b95a824beeb3ee59f5ac3450bd7a7f1b SHA-256: fa1ebb0c7c6f14f16568fd019980dc1b5c28e2588e86ab18bacfff21cfb0f6a4
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to external PDF files, a technique often used to manipulate search engine rankings or to host malicious content. One of the embedded URLs, https://ttraff.ru/pify?keyword=tips+for+happy+life+pdf, is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. No scripts were extracted from this sample.

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.ru/pify?keyword=tips+for+happy+life+pdf
    • http://files.mattleemitchell.com/uploads/1/3/1/4/131408465/jaxiwupupumesoz.pdf
    • http://files.addedsouls.com/uploads/1/3/0/8/130873875/8855784.pdf
    • http://files.antiquefairscornwall.co.uk/uploads/1/3/0/9/130969146/b23fe122b7a237.pdf
    • http://files.yunkawasiperu.org/uploads/1/3/1/3/131379612/vizarifogumawov.pdf
    • https://cdn.shopify.com/s/files/1/0432/9209/8724/files/asymptotic_analysis_and_perturbation_theory.pdf
    • https://cdn.shopify.com/s/files/1/0437/8152/1560/files/86721778711.pdf
    • https://cdn.shopify.com/s/files/1/0432/4425/7442/files/1261664609.pdf
    • https://cdn.shopify.com/s/files/1/0435/5378/3967/files/great_is_thy_faithfulness_d.pdf
    • https://cdn.shopify.com/s/files/1/0433/0071/6694/files/77849951588.pdf
    • https://cdn.shopify.com/s/files/1/0438/3493/3408/files/human_body_systems_and_their_functions_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0429/6943/2230/files/soft_copy_of_resume.pdf
    • https://cdn.shopify.com/s/files/1/0436/5965/7374/files/famamimatakuxidur.pdf
    • https://cdn.shopify.com/s/files/1/0431/7098/8196/files/71335632323.pdf
    • https://cdn.shopify.com/s/files/1/0434/6331/1520/files/fadakanitelo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6350/9143/files/91299782998.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_off00007fdb.bin
a3e099a1701e13b727ac74d41d5aa12a54557bddc1803b6b7f65276fc00ca242		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FDB 5180 bytes
font_01_sfnt_off00009174.bin
89bff3d52431329c79876e900c594711d81052bdaf662e9480590a74dfdf9770		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9174 10024 bytes

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