Malicious PDF — malware analysis report

Static analysis result for SHA-256 1480cb36e617f51d…

MALICIOUS

PDF

42.0 KB Created: 2020-08-13 23:36:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6fea82b3d23dcc8682f749883d0e9759 SHA-1: 72015709a23f89a6618ef1da19a504c2b85f4e68 SHA-256: 1480cb36e617f51d493ac538d037ef22cfc10a00d606419d47631fe57adf82da
174 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one prominently pointing to a known malicious redirector. The document body, though partially obfuscated, includes text related to a '3ds max 2018 update 5' and the malicious URL, suggesting a lure to trick users into downloading a malicious file or visiting a compromised site. The presence of a link farm and a malicious redirector strongly indicates 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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=3ds+max+2018+update+5
    • http://xagil.standardpoodleforsale.com/uploads/1/3/1/4/131408738/4a44a172b.pdf
    • http://mixusagi.planningprotocol2.com/uploads/1/3/0/8/130814761/sovetipevexidel.pdf
    • http://gugok.newumbrella.org/uploads/1/3/2/6/132682076/af61de5d21.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/9064/8996/files/55196525726.pdf
    • https://cdn.shopify.com/s/files/1/0431/1010/5237/files/sozeratefibekuturusadulo.pdf
    • https://cdn.shopify.com/s/files/1/0433/8457/0019/files/palofafij.pdf
    • https://cdn.shopify.com/s/files/1/0430/8143/3242/files/vafibutakuve.pdf
    • https://cdn.shopify.com/s/files/1/0432/1935/3757/files/fapulasojibalisumow.pdf
    • https://cdn.shopify.com/s/files/1/0434/4007/9005/files/17346802105.pdf
    • https://cdn.shopify.com/s/files/1/0434/6209/9109/files/spinning_color_wheel.pdf
    • https://cdn.shopify.com/s/files/1/0434/5308/7909/files/45433488391.pdf
    • https://cdn.shopify.com/s/files/1/0430/9119/8112/files/73706070757.pdf
    • https://cdn.shopify.com/s/files/1/0438/2395/6125/files/63381194865.pdf
    • https://cdn.shopify.com/s/files/1/0431/5371/9453/files/critical_thinking_in_education_a_review.pdf
    • https://cdn.shopify.com/s/files/1/0429/9826/8065/files/faledijinop.pdf
    • https://cdn.shopify.com/s/files/1/0434/2988/8161/files/spider_man_comics_online.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_off000064ce.bin
f9ef5917983ad936d22086f3504b32f2c5f5de5585630c94245696492c2a909d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64CE 5756 bytes
font_01_sfnt_off00007858.bin
58851846cd12bec7f2efba672119d14df1d57d530407f85223e01c4147af2962		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7858 10172 bytes

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