Malicious PDF — malware analysis report

Static analysis result for SHA-256 7efe17af1a254dd4…

MALICIOUS

PDF

46.5 KB Created: 2020-08-01 08:13:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c053d410846ce147b317b7948dc3222 SHA-1: 0aaccf39663bcd3ace1528c14f7e036c7e476b00 SHA-256: 7efe17af1a254dd492624349b23cc0a3b47020e2f9aaf23c766884e19969b866
162 Risk Score

Malware Insights

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

The PDF contains a link disguised as a driver download that redirects to malicious infrastructure. The PDF also hosts a large number of links, many of which point to benign Shopify URLs, suggesting a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the presence of malicious redirector links and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=marvell+avastar+wireless+ac+network+controller+driver
    • http://files.westlakejuniorwomensclub.com/uploads/1/3/1/3/131382092/a6f56f11d15363.pdf
    • http://files.southerntackleworksfl.com/uploads/1/3/1/4/131482991/5042538.pdf
    • http://files.yongintaekwondocollege.com/uploads/1/3/0/8/130814980/2644989.pdf
    • http://files.mynewonline.store/uploads/1/3/1/4/131438418/6129985.pdf
    • http://files.sar-ru.com/uploads/1/3/1/4/131437669/jodewuvituwup-rapezamudolunu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/1659/3312/files/ludebiwanonolaru.pdf
    • https://cdn.shopify.com/s/files/1/0427/9074/8316/files/niwelajusidelusa.pdf
    • https://cdn.shopify.com/s/files/1/0440/7210/8197/files/wapowunufevepisifimonut.pdf
    • https://cdn.shopify.com/s/files/1/0436/0067/4978/files/vugareduwibubifumatija.pdf
    • https://cdn.shopify.com/s/files/1/0429/0379/7913/files/mufuvafuraxo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5936/3483/files/26347522050.pdf
    • https://cdn.shopify.com/s/files/1/0431/1518/4295/files/jeraxogasosukeresopox.pdf
    • https://cdn.shopify.com/s/files/1/0430/8231/7975/files/wenefuxejuwurotidikigewup.pdf
    • https://cdn.shopify.com/s/files/1/0432/8954/2809/files/31079270118.pdf
    • https://cdn.shopify.com/s/files/1/0433/5727/4270/files/roluka.pdf
    • https://cdn.shopify.com/s/files/1/0430/7949/9940/files/export_bookmarks_chrome.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_off0000776a.bin
1232f2200cb37c0cff30e3c52cb86e40b5af631d4b985c730837f188fed9f219		 pdf-font-stream PDF embedded font (sfnt) at offset 0x776A 5152 bytes
font_01_sfnt_off0000891f.bin
bdba9bb52d016dd643170995507687ab0f11ab172cb0887caa6f2b2c76bfd7eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x891F 10428 bytes

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