Malicious PDF — malware analysis report

Static analysis result for SHA-256 0feb09b05e9954d1…

MALICIOUS

PDF

42.8 KB Created: 2020-08-10 01:54:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb1caef21dc288a71108ebfb4a6ab30f SHA-1: c20b7c12751da34eb7a822052774370e7e2811f8 SHA-256: 0feb09b05e9954d1a2711737d039cb18476ba3ffb941afa9364571e1554a2ba0
162 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised as a free converter. It also features a large number of links to other PDFs, suggesting a link farm for SEO manipulation or to host further malicious content. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs and a download button lure supports a phishing or scam 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.cc/pify?keyword=converter+pdf+to+kindle+format+free
    • http://xumex.vashonsheepdogclassic.com/uploads/1/3/0/8/130874329/jojoz.pdf
    • http://files.backlotcoffee.com/uploads/1/3/0/7/130775603/8211403.pdf
    • http://negimovap.int-rec.com/uploads/1/3/1/4/131454065/7720080.pdf
    • http://files.audaciousmonkey.com/uploads/1/3/1/4/131483128/8cc41aa33f7b343.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/2658/6520/files/activate_windows_watermark_removal.pdf
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/livowizakim.pdf
    • https://cdn.shopify.com/s/files/1/0433/9918/4551/files/medical_law_ethics_and_bioethics.pdf
    • https://cdn.shopify.com/s/files/1/0430/3713/0914/files/katitez.pdf
    • https://cdn.shopify.com/s/files/1/0436/1771/4334/files/emotional_intelligence_daniel_goleman_summary.pdf
    • https://cdn.shopify.com/s/files/1/0431/0073/3596/files/jonalenumejab.pdf
    • https://cdn.shopify.com/s/files/1/0437/1742/7352/files/adblock_ie_11.pdf
    • https://cdn.shopify.com/s/files/1/0433/4649/3605/files/51523984860.pdf
    • https://cdn.shopify.com/s/files/1/0436/3105/0915/files/bobcat_325_specifications.pdf
    • https://cdn.shopify.com/s/files/1/0448/6037/5201/files/acing_contracts_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/4372/4186/files/93131840736.pdf
    • https://cdn.shopify.com/s/files/1/0427/8845/4559/files/9198526745.pdf
    • https://cdn.shopify.com/s/files/1/0437/5026/0890/files/facebook_social_media_marketing_strategy.pdf
    • https://cdn.shopify.com/s/files/1/0427/6820/3942/files/gimeriporinuwafasodojuk.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_off00006a66.bin
f9614b3979354ddd6e2f7a8d20dd77c182223b52f540ff1c02ebdd48260c2fbe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A66 5040 bytes
font_01_sfnt_off00007b7c.bin
83459e86cec0539a0f71414b83a2431c3cd94c6503ac8a4f9eb7954d1849e8ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B7C 10144 bytes

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