Malicious PDF — malware analysis report

Static analysis result for SHA-256 fca869e80de9b10c…

MALICIOUS

PDF

52.3 KB Created: 2020-08-08 15:52:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e2863ac027cde3439cbf7ee3f3de8982 SHA-1: a290af806789514850dbfd2a6a2890c68a29c567 SHA-256: fca869e80de9b10caa7737e116d1e34c6e1e49a06f6f34e010aff976242572aa
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which are disguised as PDF files hosted on Shopify. The primary link, 'https://ttraff.ru/pify?keyword=ley+23554+defensa+nacional+pdf', is identified as a malicious redirector. This suggests the document's purpose is to redirect users to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted, and the document body is heavily obfuscated.

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=ley+23554+defensa+nacional+pdf
    • http://files.theinnatraggededge.com/uploads/1/3/0/8/130874240/12c58bf09.pdf
    • http://temoxegu.bkhouse.services/uploads/1/3/0/9/130969204/pidizawika_rokejut_pofoxa_rigixu.pdf
    • http://files.thecuriouscatgiftshop.com/uploads/1/3/2/6/132681596/puwakir.pdf
    • http://files.genewittpto.com/uploads/1/3/0/7/130775199/duvuzuweladaj_fowisavomopal_sejoterepuv_vanalesa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/69651331918.pdf
    • https://cdn.shopify.com/s/files/1/0431/8766/7104/files/xupubumividuwov.pdf
    • https://cdn.shopify.com/s/files/1/0431/3759/7591/files/63782677057.pdf
    • https://cdn.shopify.com/s/files/1/0429/4223/4791/files/rukam.pdf
    • https://cdn.shopify.com/s/files/1/0431/5804/4826/files/juzewaziwimoluzofikuvode.pdf
    • https://cdn.shopify.com/s/files/1/0440/0254/1726/files/66622684542.pdf
    • https://cdn.shopify.com/s/files/1/0437/0844/8919/files/30918959716.pdf
    • https://cdn.shopify.com/s/files/1/0431/9323/7665/files/fiction_100_an_anthology_of_short_stories.pdf
    • https://cdn.shopify.com/s/files/1/0428/0087/3631/files/doxuvakekaz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9868/6111/files/21773359958.pdf
    • https://cdn.shopify.com/s/files/1/0432/2240/1192/files/didixurumipexakoliperejaf.pdf
    • https://cdn.shopify.com/s/files/1/0427/9051/8940/files/daguziduxalavobunivewine.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007f88.bin
26e3fe28ba2cad4c19653990e7ad8591fc990a22a37089393ccdeb44c903a127		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F88 5312 bytes
font_01_sfnt_off000091ab.bin
342a9acd18ed9138292ea199a3ff03936bc943be94706dae573c985e9708c4f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91AB 10664 bytes
font_02_sfnt_off0000b48c.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB48C 4324 bytes

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