Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ef147d43a94a8e2…

MALICIOUS

PDF

40.7 KB Created: 2020-08-04 01:03:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 65155bfcfbfe6bf1109da74e054e9571 SHA-1: b93ab599eb36ef731baf69e9c54d9f6adc8afc64 SHA-256: 5ef147d43a94a8e246044d305963b2e20e604d0b9fe67d231b1eaf2b8efd466c
154 Risk Score

Malware Insights

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

This PDF document is designed to appear as a resource for AutoCAD drawings, but it contains a large number of embedded links. One of these links, 'https://ttraff.cc/pify?keyword=autocad+3d+sample+drawings+pdf', is identified as a malicious redirector, indicating a phishing or malware distribution attempt. The presence of numerous links, many pointing to Shopify, suggests a link farm used to obscure the true malicious destination.

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=autocad+3d+sample+drawings+pdf
    • http://files.cheersfromthewasteland.com/uploads/1/3/2/3/132302780/zitoxero.pdf
    • http://files.cigdemslankard.com/uploads/1/3/1/4/131437157/zeziwe-roxezep-megajifiduwamu.pdf
    • http://files.motercontrol.com/uploads/1/3/2/7/132712315/nuxamudufetal-sibalepirubuxu.pdf
    • http://files.superdopemin.com/uploads/1/3/2/6/132682070/3c2bac.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/0645/2127/files/formas_ser_bachiller_2020_resueltas.pdf
    • https://cdn.shopify.com/s/files/1/0432/9809/5272/files/american_gangster_torrents.pdf
    • https://cdn.shopify.com/s/files/1/0435/3032/2084/files/6073429283.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rajijabobuzev.pdf
    • https://cdn.shopify.com/s/files/1/0436/9865/1288/files/rulene.pdf
    • https://cdn.shopify.com/s/files/1/0429/6278/0311/files/86215623795.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78986196578.pdf
    • https://cdn.shopify.com/s/files/1/0434/1448/7190/files/23805782487.pdf
    • https://cdn.shopify.com/s/files/1/0429/9715/3943/files/fitilabuvidi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2976/6039/files/xejazuliwudaraviw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/18410569865.pdf
    • https://cdn.shopify.com/s/files/1/0433/7762/3194/files/zowunipikar.pdf
    • https://cdn.shopify.com/s/files/1/0432/0247/8237/files/lutavud.pdf
    • https://cdn.shopify.com/s/files/1/0428/2744/8476/files/93315907861.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ca0.bin
25630b6032c70b6fd6448df74b9ed63e1e68c8d409f707cd8d8b5d1580acae93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CA0 5720 bytes
font_01_sfnt_off0000701b.bin
2022ab8c3460e5a1cd485dfc37ecab5445127c1b9c04c8ab0b82be981ec313b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x701B 10492 bytes

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