Malicious PDF — malware analysis report

Static analysis result for SHA-256 117597c4c6a4a012…

MALICIOUS

PDF

33.0 KB Created: 2020-08-09 05:57:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 73b18c1ccceb6d7b0a43fd1fa5b40e25 SHA-1: a9844c19a737ed63cf96c3bcae5f0521c3bf5d7b SHA-256: 117597c4c6a4a0126e934a06da5bb809262fa9410bd9ba71eff0e9200657e60e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One of the primary links, 'https://ttraff.ru/pify?keyword=bibele+ya+xitsonga+pdf', is identified as a malicious redirector. This suggests the document is designed to lead users to malicious infrastructure, likely for further exploitation or phishing.

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=bibele+ya+xitsonga+pdf
    • http://kevekadem.erinjreifler.com/uploads/1/3/1/4/131437462/3121b2d28501.pdf
    • http://files.sldreads.com/uploads/1/3/2/7/132740186/pamodopugugaz.pdf
    • http://files.brentfunkhousermusic.com/uploads/1/3/0/8/130813427/7f80f4db743b28.pdf
    • http://files.binghamroadschools.com/uploads/1/3/0/7/130739674/1ff9ffef0242ade.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8298/1278/files/sonusibut.pdf
    • https://cdn.shopify.com/s/files/1/0428/4085/0598/files/jedifoxovu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7316/6744/files/12164385979.pdf
    • https://cdn.shopify.com/s/files/1/0427/6974/4028/files/70297809631.pdf
    • https://cdn.shopify.com/s/files/1/0431/7331/4715/files/xexopolusuk.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xovigaza.pdf
    • https://cdn.shopify.com/s/files/1/0432/6014/9910/files/carrier_furnace_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/6454/1852/files/67653923923.pdf
    • https://cdn.shopify.com/s/files/1/0431/2757/0596/files/psychology_of_girl_in_love.pdf
    • https://cdn.shopify.com/s/files/1/0429/7680/5023/files/71674503235.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_off00004338.bin
f47c8a3a605ef48b22e04dd930b124f9b235724c6c5ca3ac4b199eade067e390
pdf-font-stream PDF embedded font (sfnt) at offset 0x4338 5472 bytes
font_01_sfnt_off00005600.bin
b98f9581a539ebdedd91b05fa7c8234f72b86659f0207ebb3a912a87c7078400
pdf-font-stream PDF embedded font (sfnt) at offset 0x5600 9744 bytes