Malicious PDF — malware analysis report

Static analysis result for SHA-256 add3805cd8ed53b9…

MALICIOUS

PDF

41.8 KB Created: 2020-08-10 09:54:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a517de0f0f509809ec7cf4765768b482 SHA-1: 2ec0418e0431b4067e5a118d8662f776671413a9 SHA-256: add3805cd8ed53b93a504ebe09d874750167cdd85345a7ff311cd3b72038a9d0
150 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily corrupted, contains text related to 'marriage biodata format in tamil pdf' and the malicious URL. This suggests a phishing or malware delivery attempt, leveraging a lure to redirect users to malicious infrastructure. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=marriage+biodata+format+in+tamil+pdf
    • http://favuvajan.lovedxluna.com/uploads/1/3/1/6/131636725/4858043.pdf
    • http://files.localcraft.net/uploads/1/3/0/9/130969851/mukopa.pdf
    • http://files.vuboyproductions.com/uploads/1/3/2/6/132681436/68dec2c.pdf
    • https://cdn.shopify.com/s/files/1/0437/4809/8209/files/the_myst_reader.pdf
    • https://cdn.shopify.com/s/files/1/0428/3714/7811/files/42656556866.pdf
    • https://cdn.shopify.com/s/files/1/0429/2860/3295/files/febowakumanaseb.pdf
    • https://cdn.shopify.com/s/files/1/0433/7270/7990/files/mogebonubulobozonuxoduwo.pdf
    • https://cdn.shopify.com/s/files/1/0429/3191/2857/files/torufekix.pdf
    • https://cdn.shopify.com/s/files/1/0438/1786/1277/files/xikunumaxesowul.pdf
    • https://cdn.shopify.com/s/files/1/0429/2627/6775/files/54282685553.pdf
    • https://cdn.shopify.com/s/files/1/0437/5671/6186/files/11792211646.pdf
    • https://cdn.shopify.com/s/files/1/0432/6840/7464/files/jisenip.pdf
    • https://cdn.shopify.com/s/files/1/0436/3524/5216/files/53144331597.pdf
    • https://cdn.shopify.com/s/files/1/0436/3000/2336/files/fibezufoterugozur.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_off000051f4.bin
b2ac5f03835832e61fc2128bcd2fc5daf98ef2a8d5cb6795804306f0a04024ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51F4 5328 bytes
font_01_sfnt_off0000640b.bin
33b88a64ef8c883e542f1fc67331de36b01e1b013c10e8dc189017c20692b8ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x640B 11196 bytes
font_02_sfnt_off000089d0.bin
dbbe61887b4c0df7d4f97d2f048978376409b6c18fec3951c16de81eb96ea972		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89D0 4396 bytes

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