Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e470f040b085084…

MALICIOUS

PDF

39.7 KB Created: 2020-08-21 01:51:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07c39811d2a7d41233c656b6e9d25868 SHA-1: 38e220d956af7d68ecda71e0c8d7373d4c1a4366 SHA-256: 7e470f040b085084cca3b814a7d98e091ba5929b267d63de7fc98f22c6037fc9
162 Risk Score

Malware Insights

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

The PDF contains a link to a redirector service, which is a common tactic for distributing malware or phishing pages. The document body, though heavily obfuscated, contains text related to an 'offline editor' and includes the malicious URL, suggesting a lure. The presence of numerous PDF links, many pointing to benign Shopify domains, indicates a potential link farm or SEO manipulation tactic to disguise the malicious redirector.

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=how+to++scratch+2.+0+offline+editor
    • http://files.buytriadnc.com/uploads/1/3/0/8/130814682/beferabiwuxof.pdf
    • http://files.milkandhoneystyletx.com/uploads/1/3/0/8/130874197/bd0d39939.pdf
    • http://zobas.tarahanish.com/uploads/1/3/0/7/130740206/0e63798e670.pdf
    • http://gabovotu.stillyouloveme.com/uploads/1/3/0/7/130776406/nasosubosesex.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/5543/0309/files/wound_up_crossword_answer.pdf
    • https://cdn.shopify.com/s/files/1/0435/5905/9615/files/paper_bag_size_template.pdf
    • https://cdn.shopify.com/s/files/1/0430/2218/8701/files/pamemetexagaw.pdf
    • https://cdn.shopify.com/s/files/1/0432/9301/6222/files/49257392778.pdf
    • https://cdn.shopify.com/s/files/1/0429/3391/1705/files/lowes_windham_me.pdf
    • https://cdn.shopify.com/s/files/1/0434/3631/0693/files/53443106279.pdf
    • https://cdn.shopify.com/s/files/1/0437/1913/1285/files/23803630659.pdf
    • https://cdn.shopify.com/s/files/1/0432/1764/9819/files/wugotus.pdf
    • https://cdn.shopify.com/s/files/1/0433/9754/6149/files/ccdc_222.pdf
    • https://cdn.shopify.com/s/files/1/0428/0261/0335/files/pezuropuvivatomujikolaf.pdf
    • https://cdn.shopify.com/s/files/1/0432/6454/0827/files/fuwaxifezinexus.pdf
    • https://cdn.shopify.com/s/files/1/0428/2541/6860/files/vegan_bodybuilder_diet_plan.pdf
    • https://cdn.shopify.com/s/files/1/0431/7655/8746/files/kawoteserug.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_off00005c06.bin
d907ab8b6dcde132e36a065fdb020f2be5920c0915001be1c9684d75857f3286		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C06 5468 bytes
font_01_sfnt_off00006ea4.bin
c5957489b47237b58c27bb42352491c2828332ff077d9f9aeec967b86866f969		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EA4 10584 bytes

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