Malicious PDF — malware analysis report

Static analysis result for SHA-256 8720d4ae083cf175…

MALICIOUS

PDF

43.1 KB Created: 2020-08-14 01:44:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d2fe992835a53d848f14cb04e27f5c7 SHA-1: 61fa2350765847199ce7488de31ff918ef7d2e95 SHA-256: 8720d4ae083cf175109ffced8769475ba31438e89593ab999227110cca4ab1cc
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains a large number of embedded links, many of which point to benign Shopify URLs, but one prominent link directs to a known malicious redirector at 'https://ttraff.ru/pify?keyword=cronometer+app+android'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure users to malicious infrastructure. The ML classifier strongly indicated maliciousness, supporting the presence of these suspicious links.

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=cronometer+app+android
    • http://files.paludarium.net/uploads/1/3/1/4/131409264/4801d6916ea04.pdf
    • http://files.hawaiiplantationmuseum.org/uploads/1/3/0/7/130739163/6362064.pdf
    • http://napif.cometboosterclub.com/uploads/1/3/0/8/130874359/guruwa.pdf
    • http://files.okmiataclub.com/uploads/1/3/1/4/131437823/nosegipekusi_nomupiz_vuzokarolir.pdf
    • http://files.amberabel.com/uploads/1/3/1/3/131379443/a105f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/5665/0645/files/elcometer_456_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/6870/3398/files/cadette_woodworker_badge_requirements.pdf
    • https://cdn.shopify.com/s/files/1/0431/2776/7206/files/dujefegepaxapolozujim.pdf
    • https://cdn.shopify.com/s/files/1/0431/7567/4012/files/4136583363.pdf
    • https://cdn.shopify.com/s/files/1/0431/4857/4886/files/75005955515.pdf
    • https://cdn.shopify.com/s/files/1/0434/6272/1688/files/african_american_history_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0433/5989/5717/files/muslim_boy_names_in_urdu_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/6372/9557/files/wubewujerog.pdf
    • https://cdn.shopify.com/s/files/1/0431/8455/4135/files/sample_joint_venture_agreement_between_two_companies.pdf
    • https://cdn.shopify.com/s/files/1/0433/2437/5194/files/careers_in_educational_psychology.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gofifarigomikidapowokov.pdf
    • https://cdn.shopify.com/s/files/1/0434/0301/8392/files/nomorasonekipifajo.pdf
    • https://cdn.shopify.com/s/files/1/0428/4357/0343/files/61490013766.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d5d.bin
b8d8dd2bd132068f4dd7366a32d640ca47de3ee7b1828da99908676b3989ea12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D5D 4800 bytes
font_01_sfnt_off00007d86.bin
923a2f4e62611c4c1815da56b02217509903dff4e48af6ac59f66c079610e0ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D86 9984 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.