Malicious PDF — malware analysis report

Static analysis result for SHA-256 4eda1a564fea81c8…

MALICIOUS

PDF

40.9 KB Created: 2020-08-18 22:26:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f5b168cf313acc214bf229ae00bb6ec SHA-1: aafa9d8ef6e340fd4c2216374e29b3bd95a0dff9 SHA-256: 4eda1a564fea81c88654c3e1e60df47f0f51cbf86929ac58bee87bc992c615d3
152 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous external PDF files, many hosted on Shopify. The primary malicious link, https://ttraff.cc/pify?keyword=asphalt+8+mod+apk+unlimited+money+ios, is a known redirector. This suggests the document's purpose is to direct users to potentially unwanted software or malicious content through a series of redirects. 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.cc/pify?keyword=asphalt+8+mod+apk+unlimited+money+ios
    • http://files.cyspringstheatricalcompany.com/uploads/1/3/2/6/132682134/b8d9a.pdf
    • http://files.uaeeastcoast.com/uploads/1/3/1/6/131637255/6884485.pdf
    • http://files.yourmagicaldestinations.com/uploads/1/3/1/3/131384250/xabejatimunizukoxu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/75320426607.pdf
    • https://cdn.shopify.com/s/files/1/0439/2163/7544/files/35506695022.pdf
    • https://cdn.shopify.com/s/files/1/0435/2815/9396/files/remove_watermark_protected.pdf
    • https://cdn.shopify.com/s/files/1/0431/1603/6257/files/carrabba_s_italian_grill_menu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kenetawibonilolususede.pdf
    • https://cdn.shopify.com/s/files/1/0427/3097/9495/files/mafajavofijemikoze.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xuwuvedalolavotidexetugom.pdf
    • https://cdn.shopify.com/s/files/1/0431/7013/6230/files/faziripadirajejijapanada.pdf
    • https://cdn.shopify.com/s/files/1/0428/5533/4055/files/27880563806.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72890356131.pdf
    • https://cdn.shopify.com/s/files/1/0429/5681/6540/files/2004_mazda_6_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/8439/8236/files/mac_command_symbol.pdf
    • https://cdn.shopify.com/s/files/1/0431/6646/6216/files/interior_design_flyer_template.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_off0000618f.bin
393d87e5d5bf51564694187d94e7a246b595cc72e1059bc353d613cd9dc1324f
pdf-font-stream PDF embedded font (sfnt) at offset 0x618F 5452 bytes
font_01_sfnt_off000073fc.bin
9ae4b8bf1c95f4804ba5ff770d285925279f3ab93f269ae99d6c92b2cc1ba944
pdf-font-stream PDF embedded font (sfnt) at offset 0x73FC 10184 bytes