Malicious PDF — malware analysis report

Static analysis result for SHA-256 038094bf345079bf…

MALICIOUS

PDF

34.7 KB Created: 2020-08-23 21:59:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2271b5716fcd65cff32c401a660c730e SHA-1: abf5b50fc093db63aa7be615c5d6f723d48ccb07 SHA-256: 038094bf345079bfe0eb922ad13c8e1107880c5fe02d47be34fc99514c3225de
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to a redirector service that is flagged as malicious. The document body, though heavily obfuscated, contains a URL that appears to be the primary lure. The ML classifier strongly indicates maliciousness, and the presence of a malicious redirector suggests an attempt to lead the user to a malicious site, likely for credential harvesting or further malware delivery.

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.ru/pify?keyword=company+profile+folder+design+template
    • http://popamibu.americameditating.org/uploads/1/3/0/8/130814297/vaxegufaz-vumeji.pdf
    • http://files.danielandnatasha.info/uploads/1/3/1/0/131071114/1910230.pdf
    • http://files.nwapetgrooming.com/uploads/1/3/1/4/131437515/norozox-rovenesulonu-suwujabuvil.pdf
    • http://pasul.for-medit.com/uploads/1/3/1/0/131071073/40203.pdf
    • http://files.shavanocreek.com/uploads/1/3/1/8/131871730/3886683.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9229/6358/files/72364451870.pdf
    • https://cdn.shopify.com/s/files/1/0434/2756/1628/files/tidedoxetag.pdf
    • https://cdn.shopify.com/s/files/1/0431/6296/0021/files/video_editor_old_version.pdf
    • https://cdn.shopify.com/s/files/1/0427/7361/0663/files/62932094342.pdf
    • https://cdn.shopify.com/s/files/1/0434/3581/9164/files/nowuzoguduvavav.pdf
    • https://cdn.shopify.com/s/files/1/0444/6827/3319/files/accord_du_participe_pass_tre_et_avoir.pdf
    • https://cdn.shopify.com/s/files/1/0428/6365/7119/files/neurofibromatosis_pediatria.pdf
    • https://cdn.shopify.com/s/files/1/0439/1275/7400/files/juboro.pdf
    • https://cdn.shopify.com/s/files/1/0438/8959/0427/files/94429401008.pdf
    • https://cdn.shopify.com/s/files/1/0434/9794/7288/files/romusurarogarijoj.pdf
    • https://cdn.shopify.com/s/files/1/0433/4508/4574/files/68416668594.pdf
    • https://cdn.shopify.com/s/files/1/0435/1921/3727/files/anesthesia_tutorial_of_the_week.pdf
    • https://cdn.shopify.com/s/files/1/0430/5593/9733/files/24369655435.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_off000049e1.bin
50b21095edc47d6549227ca4d30339faeb13419c0b670a88c2ef065fc9844f3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x49E1 5368 bytes
font_01_sfnt_off00005c0d.bin
49359d832b9c9b9feb3e1e02da903c7761d70f11d89b4346157f966d9db2c062		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C0D 10144 bytes

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