Malicious PDF — malware analysis report

Static analysis result for SHA-256 7502b023c844afe2…

MALICIOUS

PDF

40.8 KB Created: 2020-08-10 18:38:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 89a36a37956feb4f7524fa43259a12b1 SHA-1: 0734f9aa60c8e0001fdf5645334d1785195df398 SHA-256: 7502b023c844afe2dc63f95f94eb7571b1c8d548efbe911615ea13258c5f2166
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious redirectors or SEO link farms. The primary malicious URL identified is https://ttraff.cc/pify?keyword=calendar+2020+november+december+pdf, which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this URL and other Shopify-hosted PDF links, suggesting a coordinated effort to distribute malicious content or phish users.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=calendar+2020+november+december+pdf
    • http://files.hiddenpinesclyde.com/uploads/1/3/0/7/130775556/7907090.pdf
    • http://files.plymouthwatercolour.com/uploads/1/3/1/1/131164009/5f024ab.pdf
    • http://files.teachingtheapocalypse.com/uploads/1/3/0/8/130874278/fenalexiwo.pdf
    • http://files.msportsix.com/uploads/1/3/0/7/130776037/vixotanimavava.pdf
    • http://files.sweetmonroesbakery.com/uploads/1/3/2/6/132681586/46370af9879e36.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/2371/9845/files/83762054247.pdf
    • https://cdn.shopify.com/s/files/1/0438/2192/4514/files/heterocyclic_amines.pdf
    • https://cdn.shopify.com/s/files/1/0434/6285/2773/files/76081730381.pdf
    • https://cdn.shopify.com/s/files/1/0432/0568/9499/files/accutron_214_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/mathematics_for_commerce_economics_and_business.pdf
    • https://cdn.shopify.com/s/files/1/0434/8834/6262/files/bomuvobezuvi.pdf
    • https://cdn.shopify.com/s/files/1/0430/3313/3209/files/64115949253.pdf
    • https://cdn.shopify.com/s/files/1/0431/7963/8942/files/kuwapezudutagoxawawetelaw.pdf
    • https://cdn.shopify.com/s/files/1/0430/4447/0945/files/vojopabinobiretataza.pdf
    • https://cdn.shopify.com/s/files/1/0431/8127/7342/files/payment_terms_and_conditions_sample.pdf
    • https://cdn.shopify.com/s/files/1/0432/5569/3470/files/lakedalef.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_off0000600d.bin
39d58a7f62b67e8648ad88e75e9944240cc123824083047b7e14c24f1e8b71af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x600D 5500 bytes
font_01_sfnt_off000072ac.bin
0479378f51e38d271a9d9f3fa980b50b63ddaa48811143dc194f4e0001131e40		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72AC 10500 bytes

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