Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcccad2ad23175e2…

MALICIOUS

PDF

52.3 KB Created: 2020-08-08 14:51:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8686d5d685cf7219a74b699cf96c8c8d SHA-1: 0e9f136c24abee19eaec5fcde644e6bcbc1f1835 SHA-256: fcccad2ad23175e28ae0b2f0ae775532c218cfacbed791a37b90c7ce9c03ada2
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to a 'chemistry textbook online pdf' and includes the malicious URL. This suggests a social engineering attack aiming to trick users into visiting a malicious site, likely for further payload delivery or credential harvesting. The presence of a 'download button' heuristic further supports this lure-based attack pattern.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=chemistry+textbook+online+pdf
    • http://files.pandorascollective.com/uploads/1/3/1/4/131452958/7668435.pdf
    • http://files.mrchriswells.com/uploads/1/3/1/8/131871740/wupusiwumomur_pefadonuf_rasowod_lefan.pdf
    • http://files.safedart.info/uploads/1/3/0/7/130738534/4627335.pdf
    • http://files.carsandcrochet.com/uploads/1/3/0/9/130969220/duxizexat-bukepasijusitu.pdf
    • http://files.ganglionsoftware.com/uploads/1/3/2/3/132302923/wibejilet_senebijodon_bedatijiw_dipekapom.pdf
    • https://cdn.shopify.com/s/files/1/0433/9613/7111/files/13533293228.pdf
    • https://cdn.shopify.com/s/files/1/0433/1382/3909/files/75081253769.pdf
    • https://cdn.shopify.com/s/files/1/0430/9634/2695/files/56185151826.pdf
    • https://cdn.shopify.com/s/files/1/0435/0879/3510/files/vefovekonunufumerilifani.pdf
    • https://cdn.shopify.com/s/files/1/0433/4285/6344/files/93789206116.pdf
    • https://cdn.shopify.com/s/files/1/0433/8188/3047/files/robert_bryndza_cold_blood.pdf
    • https://cdn.shopify.com/s/files/1/0431/8406/2622/files/categorical_syllogism_venn_diagram.pdf
    • https://cdn.shopify.com/s/files/1/0433/4852/5206/files/jotok.pdf
    • https://cdn.shopify.com/s/files/1/0432/5956/0094/files/49511574363.pdf
    • https://cdn.shopify.com/s/files/1/0431/0532/1109/files/fozusimudibakodisuxuju.pdf
    • https://cdn.shopify.com/s/files/1/0433/7431/3622/files/data_structures_and_algorithms_in_c_wiley.pdf
    • https://cdn.shopify.com/s/files/1/0434/0927/7095/files/62608288346.pdf
    • https://cdn.shopify.com/s/files/1/0434/1792/7837/files/pasitod.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_off00008dd5.bin
574097ff1a81cb4f283967c41c8fc28adc9cee0ffc4d3a779ef751f600dcbbdc
pdf-font-stream PDF embedded font (sfnt) at offset 0x8DD5 5348 bytes
font_01_sfnt_off00009fdb.bin
78d2dee34adf354844b1345541c8229cd58bd5fe3a6783320d31415300ed3fca
pdf-font-stream PDF embedded font (sfnt) at offset 0x9FDB 10812 bytes