Malicious PDF — malware analysis report

Static analysis result for SHA-256 88f3612f1fdbdac4…

MALICIOUS

PDF

36.1 KB Created: 2020-08-11 01:18:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8295a9a8db6129c5f8ab3449af200fc5 SHA-1: 3c8fcec159d20c4f99ea137311ed496e39836093 SHA-256: 88f3612f1fdbdac4bad9e98d7d28b20edf4ac69e0738cdc4b74e79e49a7b9532
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=animal+and+plant+cell+quiz+pdf'. The document body, though heavily obfuscated, contains references to 'Animal and plant cell quiz pdf' and includes the malicious URL. The presence of a link farm heuristic further suggests an attempt to distribute malicious content. The primary attack pattern involves luring users to a malicious site under the guise of a quiz.

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.cc/pify?keyword=animal+and+plant+cell+quiz+pdf
    • http://files.afamilyonwheels.com/uploads/1/3/2/7/132740327/jixewasu-roxuw-gitawujome-diporopitax.pdf
    • http://files.quilledcards.com/uploads/1/3/1/4/131437106/saperuzede-mumibesomod.pdf
    • http://golik.rowenascotney.com/uploads/1/3/0/8/130874330/1731500.pdf
    • http://zozidejoj.trailwaybrewing.com/uploads/1/3/1/4/131452883/3339489.pdf
    • https://cdn.shopify.com/s/files/1/0430/3300/2145/files/6617084096.pdf
    • https://cdn.shopify.com/s/files/1/0437/6176/2456/files/xijamutiwog.pdf
    • https://cdn.shopify.com/s/files/1/0427/7311/9143/files/adobe_reader_for_mac_update.pdf
    • https://cdn.shopify.com/s/files/1/0430/1049/0519/files/escola_parque_anisio_teixeira.pdf
    • https://cdn.shopify.com/s/files/1/0432/4422/4679/files/pearson_envision_math_grade_5.pdf
    • https://cdn.shopify.com/s/files/1/0432/2269/6096/files/jozozuwewabok.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/matam.pdf
    • https://cdn.shopify.com/s/files/1/0438/0209/9873/files/71626350299.pdf
    • https://cdn.shopify.com/s/files/1/0436/6693/1862/files/broiler_production_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/3141/2379/files/33088418954.pdf
    • https://cdn.shopify.com/s/files/1/0430/8389/0850/files/59439701177.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90675932679.pdf
    • https://cdn.shopify.com/s/files/1/0431/3615/5809/files/drug_resistant_malaria.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000051a8.bin
e3ccaeb17e4d68175d7b5a5d1984707c83006601a5267ff343b65f806eebc2de
pdf-font-stream PDF embedded font (sfnt) at offset 0x51A8 5192 bytes
font_01_sfnt_off0000633d.bin
2b6b6d98aa797d8068cd58240fc39b9f0bc75bf4be6b85edd274a5fd72c992eb
pdf-font-stream PDF embedded font (sfnt) at offset 0x633D 9492 bytes