Malicious PDF — malware analysis report

Static analysis result for SHA-256 12927e987479eb97…

MALICIOUS

PDF

45.3 KB Created: 2020-08-06 12:48:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c89b06e8b3e780d8deda921badecb146 SHA-1: 6c7c3911135b6f7b64373ca96ca2e1502e188ea4 SHA-256: 12927e987479eb97723f340552be368a48c0577d3d48cb351019bc9db629f04c
154 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to external websites. One of these links, 'https://ttraff.ru/pify?keyword=expresiones+mas+comunes+en+ingles+pdf', is identified as a malicious redirector. The document's structure and the presence of numerous links suggest an attempt to direct users to malicious infrastructure, likely for phishing or malware distribution. No scripts were extracted, but the PDF's nature implies it's designed to exploit user interaction with embedded links.

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.ru/pify?keyword=expresiones+mas+comunes+en+ingles+pdf
    • http://files.fvhca.org/uploads/1/3/0/9/130969169/jeluloxutol-gukunes-dubobuwov.pdf
    • http://files.jjrrlab.com/uploads/1/3/0/8/130873907/75d05.pdf
    • http://files.socalvetsupport.org/uploads/1/3/0/8/130874652/simapunomaped_rudenevamamin.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/7879/4917/files/xuxazebezozel.pdf
    • https://cdn.shopify.com/s/files/1/0438/8493/7384/files/amway_atmosphere_sky.pdf
    • https://cdn.shopify.com/s/files/1/0430/9634/2695/files/mawoworanapi.pdf
    • https://cdn.shopify.com/s/files/1/0437/4485/4165/files/37455777469.pdf
    • https://cdn.shopify.com/s/files/1/0428/4357/0343/files/nikita_season_4.pdf
    • https://cdn.shopify.com/s/files/1/0433/4796/8149/files/30547831232.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gaxasukazojolivuf.pdf
    • https://cdn.shopify.com/s/files/1/0429/3646/7623/files/nero_6_serial_number.pdf
    • https://cdn.shopify.com/s/files/1/0434/3444/2908/files/gugeratowijoroxefisu.pdf
    • https://cdn.shopify.com/s/files/1/0427/4031/8375/files/39595813427.pdf
    • https://cdn.shopify.com/s/files/1/0438/3830/8512/files/principles_of_surgical_asepsis.pdf
    • https://cdn.shopify.com/s/files/1/0430/8431/6823/files/sweet_dream_marilyn_manson_tab.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065ee.bin
589c39740a888292f463ca2492ba9d841ca4166284db74276c04658ff149cd38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65EE 5500 bytes
font_01_sfnt_off0000788b.bin
daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x788B 1800 bytes
font_02_sfnt_off00008119.bin
d262526d2284a6fbaa0691ae66295b2b5c79886d1ec29ab494b166870fa32597		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8119 11420 bytes

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