Malicious PDF — malware analysis report

Static analysis result for SHA-256 31f7c35655a8b38e…

MALICIOUS

PDF

46.0 KB Created: 2020-08-14 05:52:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a705617763467134f78770c0a82b78fa SHA-1: 81b8c0c6df6aa35704540b4d56a845e0408e3230 SHA-256: 31f7c35655a8b38eb17b1e252ff6a2e7b874f130403606d59269803ef99d2208
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of the primary links, 'https://ttraff.ru/pify?keyword=monthly+calendar+template+online', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to calendar templates and the malicious URL, suggesting a lure to redirect users to potentially harmful content.

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=monthly+calendar+template+online
    • http://files.northernbcregionalsciencefair.ca/uploads/1/3/1/4/131437987/ronetuzuvevunipogif.pdf
    • http://files.moorhaystoneandslate.co.uk/uploads/1/3/1/8/131856072/2817151.pdf
    • http://files.michaeltmeier.com/uploads/1/3/1/8/131856392/778293.pdf
    • http://files.30westfitandrec.com/uploads/1/3/2/7/132740239/muzoguxo_xugixo_todaxerisoragog_lesujejivafe.pdf
    • http://sinuja.rashannaharmon.com/uploads/1/3/1/8/131856935/gamufewenofuze.pdf
    • https://cdn.shopify.com/s/files/1/0438/9208/0792/files/kujodom.pdf
    • https://cdn.shopify.com/s/files/1/0431/4886/9789/files/jofuvelutefosukuzumere.pdf
    • https://cdn.shopify.com/s/files/1/0433/4092/3048/files/manual_de_frances_para_principiantes.pdf
    • https://cdn.shopify.com/s/files/1/0433/9076/3175/files/mibumer.pdf
    • https://cdn.shopify.com/s/files/1/0431/1062/9532/files/mitumuribam.pdf
    • https://cdn.shopify.com/s/files/1/0435/9726/7112/files/types_of_behavioural_management_approach.pdf
    • https://cdn.shopify.com/s/files/1/0450/2247/8494/files/pasuxulelevuwatapoz.pdf
    • https://cdn.shopify.com/s/files/1/0433/4839/4142/files/3ds_cia_apps.pdf
    • https://cdn.shopify.com/s/files/1/0437/9040/1687/files/orthographic_drawing_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/3545/0774/files/35711989856.pdf
    • https://cdn.shopify.com/s/files/1/0432/3331/2925/files/ncert_biology_download.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_off000069d1.bin
77e987893c50b5c630e3025d7f888f3d3cf108d56c653828174cb87df12cc560
pdf-font-stream PDF embedded font (sfnt) at offset 0x69D1 5028 bytes
font_01_sfnt_off00007abb.bin
0beddd4a92ea7a086de0d21fb0f860532684b0fdb7478e97169476b57c7b9107
pdf-font-stream PDF embedded font (sfnt) at offset 0x7ABB 9964 bytes
font_02_sfnt_off00009cd8.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x9CD8 4324 bytes