Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e36f62b27d6e1ce…

MALICIOUS

PDF

48.2 KB Created: 2020-08-02 18:51:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f6e71f2391a7a7ace34e712f9ca91a21 SHA-1: 5a4fed29f5c612c1383d32878adcef16d6d195c7 SHA-256: 2e36f62b27d6e1cee189c47e60de743c790a66a95565458ba7ebd4e5f3f7cdf7
152 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The heuristic firings indicate this PDF is part of a link farm, likely designed to manipulate search engine results or distribute malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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=hamari+adhuri+kahani+lyrics
    • http://files.theyouthdude.com/uploads/1/3/0/7/130776158/vugavoworej_fusuwibawite_zomamedixim.pdf
    • http://files.stcatherineschurchlittlehampton.org/uploads/1/3/2/8/132815004/bodexaka-murawe.pdf
    • http://files.woodbridgelimo.org/uploads/1/3/0/9/130969966/5934810.pdf
    • https://cdn.shopify.com/s/files/1/0433/8620/8406/files/92850772433.pdf
    • https://cdn.shopify.com/s/files/1/0434/6295/1062/files/visual_studio_code_mac.pdf
    • https://cdn.shopify.com/s/files/1/0440/9327/6312/files/togedefevanajit.pdf
    • https://cdn.shopify.com/s/files/1/0431/8252/2528/files/tuberewidoxofukizizesoke.pdf
    • https://cdn.shopify.com/s/files/1/0437/8561/7570/files/11873753830.pdf
    • https://cdn.shopify.com/s/files/1/0431/0263/4148/files/timiroxot.pdf
    • https://cdn.shopify.com/s/files/1/0431/8461/9680/files/32103237064.pdf
    • https://cdn.shopify.com/s/files/1/0429/3584/5017/files/xinomipiduvapubel.pdf
    • https://cdn.shopify.com/s/files/1/0430/1553/6793/files/rusobola.pdf
    • https://cdn.shopify.com/s/files/1/0429/6038/8262/files/dunidogumejapafirel.pdf
    • https://cdn.shopify.com/s/files/1/0431/0489/5143/files/nirefesoxepug.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_off00005e13.bin
0f10162a6778bf1594bf40608e47ea176f739035cccfe3222efedec91b831a4d
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E13 5308 bytes
font_01_sfnt_off00006ff6.bin
1239387a3a9229fbe0d82caae7a973f45483ee917a6b9cc150680fb043714e31
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FF6 14924 bytes
font_02_sfnt_off00009e43.bin
e3b9e4ac7ef6202c915b690c4274165985373cce75c04bb4cf1c3d2bfbd3ed25
pdf-font-stream PDF embedded font (sfnt) at offset 0x9E43 16336 bytes