Malicious PDF — malware analysis report

Static analysis result for SHA-256 1224eaf3e44d7be6…

MALICIOUS

PDF

46.8 KB Created: 2020-08-21 23:27:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 304a28f191d1a93b18ed2f719e5f04df SHA-1: a5fddb62aced6d8d794d7a697eeeee4b85fa6a95 SHA-256: 1224eaf3e44d7be6125d833d9e89621f6b6cacf1d1a449d4d8cc18d79604b28b
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector infrastructure. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting an attempt to manipulate search engine results or distribute more malicious content. While no scripts were directly extracted, the PDF structure and embedded links strongly suggest a malicious intent to redirect users to harmful sites.

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=tamil+new+movies+songs++2019+isaimini
    • http://files.kernefc.org/uploads/1/3/2/6/132682630/gumepuzafasofoguzajo.pdf
    • http://sizad.total-insurancesolutions.com/uploads/1/3/2/8/132814930/7479548.pdf
    • http://vuxokeju.eastpauldingyouthfootball.com/uploads/1/3/0/8/130874575/6e8733e206103.pdf
    • http://files.popcscounseling.org/uploads/1/3/2/3/132302960/vujezejugelefemiwel.pdf
    • http://rojizob.lilydobb.com/uploads/1/3/1/3/131379578/dumumokusodaw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0430/4722/3458/files/37019379586.pdf
    • https://cdn.shopify.com/s/files/1/0450/6406/1078/files/break_even_analysis_examples.pdf
    • https://cdn.shopify.com/s/files/1/0431/6318/9412/files/gowezoke.pdf
    • https://cdn.shopify.com/s/files/1/0434/0380/4839/files/mepapudapezel.pdf
    • https://cdn.shopify.com/s/files/1/0432/1073/5780/files/wozezetuwu.pdf
    • https://cdn.shopify.com/s/files/1/0428/3914/6662/files/pujusilapagosuku.pdf
    • https://cdn.shopify.com/s/files/1/0436/1197/9939/files/hideout_tv_sign_up.pdf
    • https://cdn.shopify.com/s/files/1/0437/6435/1130/files/93553046955.pdf
    • https://cdn.shopify.com/s/files/1/0435/9749/6483/files/gisatekelokunixafi.pdf
    • https://cdn.shopify.com/s/files/1/0430/1104/7575/files/rabagolumokegekorikatota.pdf
    • https://cdn.shopify.com/s/files/1/0429/7188/9815/files/gidufazususuxobuwi.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004709.bin
c24b479013845ba55baadd2bd78e4d3ed56ac19c2c4fa901ed9c8f4e8e07fd87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4709 5492 bytes
font_01_sfnt_off000059c5.bin
0bcf0cf209d65ad4930096b0f8fca681874d12f8ddff4ad3f7647627a0da8453		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59C5 8780 bytes
font_02_sfnt_off00007308.bin
6202835356c39628484368fefb3812a5a65690f43b562dfb4c15a69cc05a060a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7308 9988 bytes
font_03_sfnt_off000094fc.bin
ad06410989f9cc18b5e0fccc4f3b6bef9ade42ec40a939792eb9f209465812f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94FC 16320 bytes

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