Malicious PDF — malware analysis report

Static analysis result for SHA-256 0be5d81fa0d785fc…

MALICIOUS

PDF

47.1 KB Created: 2020-08-05 08:44:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a40e33279b4360642c35313f6ab9dbe SHA-1: 0de6d65a6bf076f74a1dff31e80933f3485fb61f SHA-256: 0be5d81fa0d785fccf70d18d3e17585eb68aefc3c84c2b7b6a2fcc97c3a68433
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with a critical heuristic identifying it as a malicious redirector. The primary malicious URL, 'https://ttraff.ru/pify?keyword=bet+equation+pdf', is a clear indicator of malicious intent, likely leading to a phishing or malware distribution site. The presence of a large number of external PDF links suggests an attempt to manipulate search engine results or create a link farm for malicious purposes.

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=bet+equation+pdf
    • http://files.sanspointe.org/uploads/1/3/0/9/130969356/ligumixujepefep_roporus_fanovowododuk.pdf
    • http://files.sunriseonlinenews.com/uploads/1/3/2/7/132740965/nezuvosarud.pdf
    • http://files.candle-licious.com/uploads/1/3/1/3/131398515/6561716.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/6875/2023/files/towiva.pdf
    • https://cdn.shopify.com/s/files/1/0429/1228/4831/files/xomifavatalerovenedawep.pdf
    • https://cdn.shopify.com/s/files/1/0433/3741/6869/files/31512597465.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/nawilabovu.pdf
    • https://cdn.shopify.com/s/files/1/0438/6711/1584/files/dixasuvi.pdf
    • https://cdn.shopify.com/s/files/1/0434/7317/4680/files/29116048029.pdf
    • https://cdn.shopify.com/s/files/1/0435/8130/9085/files/60753465366.pdf
    • https://cdn.shopify.com/s/files/1/0430/8844/5604/files/1735355496.pdf
    • https://cdn.shopify.com/s/files/1/0435/0086/3643/files/31495401010.pdf
    • https://cdn.shopify.com/s/files/1/0433/4593/6534/files/31349146302.pdf
    • https://cdn.shopify.com/s/files/1/0432/7197/9171/files/soccer_juggling_trick.pdf
    • https://cdn.shopify.com/s/files/1/0433/1628/1512/files/civ_5_spain_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/6031/3768/files/tufugujaxoxunazujuveni.pdf
    • https://cdn.shopify.com/s/files/1/0432/3724/5086/files/pilijovizer.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_off00006e52.bin
55d3240a7042c1bd302d5cbffdcda1c8bf8affee7ee02fb17693a2bad907ac99		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E52 4788 bytes
font_01_sfnt_off00007eab.bin
0cf9b16f8c255ff2926765088f978b4f88e445e72934f33caf6651b64f7c4fca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EAB 10184 bytes
font_02_sfnt_off0000a18f.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA18F 4324 bytes

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