Malicious PDF — malware analysis report

Static analysis result for SHA-256 f83222b47b6ccdb2…

MALICIOUS

PDF

40.8 KB Created: 2020-08-30 00:14:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 164fdc638bfc44225d03dda305c73916 SHA-1: 20d7e32a8ca6411a403ad7bdfb44b802ae691635 SHA-256: f83222b47b6ccdb2ba25b6953d6afbd3682c20ba9c47968778888a9735167b0d
152 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 'ttraff.com'. Additionally, it features a large number of embedded links, many hosted on 'cdn.shopify.com', suggesting a link farm or distribution mechanism. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves luring users through these links, with 'ttraff.com' being a known malicious redirector.

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.com/wix?keyword=feluda+theme+park
    • https://cdn.shopify.com/s/files/1/0439/6072/9758/files/live_football_streaming_apk_windows.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/instant_root_apk.pdf
    • https://cdn.shopify.com/s/files/1/0447/0145/0396/files/carrier_water_cooled_chiller_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mupesoxozuwimufuvijolus.pdf
    • https://cdn.shopify.com/s/files/1/0431/9969/2958/files/xogod.pdf
    • https://cdn.shopify.com/s/files/1/0429/7375/7603/files/pikefitenukexuxakufaxu.pdf
    • https://cdn.shopify.com/s/files/1/0435/3484/4059/files/converting_standard_form_to_slope_intercept_form_practice_problems.pdf
    • https://cdn.shopify.com/s/files/1/0465/0129/8334/files/adobe_premiere_pro_cc_2017_project_f.pdf
    • https://cdn.shopify.com/s/files/1/0431/6528/6566/files/nosafirusajej.pdf
    • https://cdn.shopify.com/s/files/1/0447/6187/4583/files/epa_608_test_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/6754/7552/files/android_battery_health_2.pdf
    • https://cdn.shopify.com/s/files/1/0433/4603/4846/files/nufotama.pdf
    • https://cdn.shopify.com/s/files/1/0428/7679/7081/files/86996734518.pdf
    • https://cdn.shopify.com/s/files/1/0429/5370/3590/files/jewiti.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_off000062b0.bin
3610a8e9e6b69a5f42635f1d817839c6a1dc185358c6d01d73cd9448fb08f7bd
pdf-font-stream PDF embedded font (sfnt) at offset 0x62B0 5040 bytes
font_01_sfnt_off000073ad.bin
e0ababfb3fbb232a694b904b2e65ab4aa11a9dd3011f8ccb80231245cd3a38f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x73AD 10280 bytes