Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f77d679cf65d287…

MALICIOUS

PDF

86.5 KB Created: 2020-08-05 00:52:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1ec5af61bf829d5d8144bda723bfaa58 SHA-1: 992f722a4618ebd5a472ea69752386223727ef1c SHA-256: 3f77d679cf65d287dd11e60e20d4566f699927f1ab6f40ed0b9eab0cf1154759
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous links to external resources, with a primary link to a known malicious redirector at "https://ttraff.com/pify?keyword=vatican+ii+pdf". The ML classifier strongly indicated maliciousness, and the presence of a link farm suggests an attempt to distribute malicious content or phish users. No scripts were extracted, but the PDF structure and embedded links are sufficient to infer a malicious redirection attempt.

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.com/pify?keyword=vatican+ii+pdf
    • http://files.abbysclass.com/uploads/1/3/1/4/131406785/6547152.pdf
    • http://files.nativitybloomingtonparish.org/uploads/1/3/1/6/131607093/2919008.pdf
    • http://files.procarers.com.au/uploads/1/3/1/0/131071166/7625985.pdf
    • http://files.zacharywarrenmusic.com/uploads/1/3/1/8/131871480/7576174.pdf
    • http://files.internationalcancercluster.org/uploads/1/3/0/8/130813100/a03c032.pdf
    • https://cdn.shopify.com/s/files/1/0429/1448/0287/files/gebibozuwigazixuvew.pdf
    • https://cdn.shopify.com/s/files/1/0430/6383/6834/files/70605599863.pdf
    • https://cdn.shopify.com/s/files/1/0435/6590/8136/files/gusul.pdf
    • https://cdn.shopify.com/s/files/1/0434/4106/2040/files/54100561804.pdf
    • https://cdn.shopify.com/s/files/1/0432/0568/9504/files/5231666549.pdf
    • https://cdn.shopify.com/s/files/1/0431/8648/7455/files/vedusixurikepaxapopogob.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/33435760041.pdf
    • https://cdn.shopify.com/s/files/1/0448/6791/1842/files/conjunctions_list_english_spanish.pdf
    • https://cdn.shopify.com/s/files/1/0435/9408/8616/files/hawaii_driver_s_manual_test_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/7839/3762/files/90302770026.pdf
    • https://cdn.shopify.com/s/files/1/0438/4640/2198/files/tuwojusasoxawudomaba.pdf
    • https://cdn.shopify.com/s/files/1/0431/6663/0037/files/24227092600.pdf
    • https://cdn.shopify.com/s/files/1/0432/5736/4638/files/metroid_gba_rom.pdf
    • https://cdn.shopify.com/s/files/1/0434/1222/6200/files/oral_presentation_script.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000119bd.bin
39f118530070a1dd4fd891345dcf7c1e3460ee9bcbea3db51f6d3f19e58dd18e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x119BD 4808 bytes
font_01_sfnt_off00012a3b.bin
59b45356a88f19d6d0fc672d9084f71d5a8b9e72796317bf87e6210106a921d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12A3B 10176 bytes

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