Malicious PDF — malware analysis report

Static analysis result for SHA-256 792b04af64cf61b8…

MALICIOUS

PDF

80.7 KB Created: 2020-08-09 10:31:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d912d3164a59af529b25d254f4ee8a5 SHA-1: d85cb169244c8d00cc2e4a0543ba04904302d83d SHA-256: 792b04af64cf61b8c52495d188746d8e502c176ebc61dc3f46eae8e26bf22f19
174 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, disguised as a document about NCAA basketball rules. The embedded URL, 'https://ttraff.com/pify?keyword=ncaa+basketball+rules+pdf', is a strong indicator of malicious intent, likely leading to a phishing or malware download site. The heuristic firings confirm the presence of malicious redirector links and a link farm, suggesting a campaign to distribute malicious content.

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.com/pify?keyword=ncaa+basketball+rules+pdf
    • http://files.orizoncenter.net/uploads/1/3/1/3/131380354/79b414f8.pdf
    • http://xuton.carrotflowercreative.com/uploads/1/3/1/8/131857445/4627e2.pdf
    • http://files.unionpressalters.com/uploads/1/3/0/7/130775126/wipixen.pdf
    • http://files.artbybetsybird.com/uploads/1/3/1/4/131452867/26af613a8e5576.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xigidewepiwunabifaw.pdf
    • https://cdn.shopify.com/s/files/1/0430/4276/7001/files/7113668007.pdf
    • https://cdn.shopify.com/s/files/1/0431/6043/6896/files/24601965863.pdf
    • https://cdn.shopify.com/s/files/1/0428/2961/1171/files/xizirafegarokovagusixu.pdf
    • https://cdn.shopify.com/s/files/1/0435/8517/5713/files/bezuxosisekogedo.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/intel_business_strategy_case_study.pdf
    • https://cdn.shopify.com/s/files/1/0437/9770/8957/files/chilton_manual_free.pdf
    • https://cdn.shopify.com/s/files/1/0438/3732/5462/files/xodawufogujatujusexoxanon.pdf
    • https://cdn.shopify.com/s/files/1/0447/0842/9977/files/what_are_news_values_and_why_are_they_important.pdf
    • https://cdn.shopify.com/s/files/1/0430/6989/8903/files/41803108582.pdf
    • https://cdn.shopify.com/s/files/1/0429/0369/9615/files/tepeziranikeropilalorid.pdf
    • https://cdn.shopify.com/s/files/1/0431/7007/0687/files/unistd._h_c.pdf
    • https://cdn.shopify.com/s/files/1/0435/5820/7643/files/how_to_make_colored_glass_minecraft.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_off0000fa1a.bin
6d2fa2013a508c006ec79a88906cf50cddb2d13e99e629d33f62da3fc213f611		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1A 5324 bytes
font_01_sfnt_off00010c45.bin
8eca8ff4f03bdccea685abd923b8435208eaf631d05537262db894a776e65b17		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C45 13088 bytes

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