Malicious PDF — malware analysis report

Static analysis result for SHA-256 2630b454a574e1b2…

MALICIOUS

PDF

51.5 KB Created: 2020-08-22 01:03:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c64e713bb1c661a94d3c492adfb0a745 SHA-1: abaeef0033b72a107e1ba37c186dd66191a6a492 SHA-256: 2630b454a574e1b28c31b000388dbb9cfd26720f4000b9a401be46a15aac14b1
152 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to a redirector service (ttraff.cc). This suggests an attempt to lure users to malicious content by obscuring the true destination. The ML classifier also strongly indicated maliciousness. No scripts were extracted, limiting the ability to determine the exact payload.

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=banjul+charter+pdf
    • http://files.citruscountyspeedwayandtrack.com/uploads/1/3/1/1/131163879/c8a5059.pdf
    • http://funila.tyree-mcgill.studio/uploads/1/3/1/4/131437792/53ce265.pdf
    • http://fatovemu.nihc.ca/uploads/1/3/2/6/132683138/pezofugamokuk-fabipa-puzejulagog.pdf
    • http://files.sellingnorthwesttucson.com/uploads/1/3/1/8/131872037/7597799.pdf
    • https://cdn.shopify.com/s/files/1/0432/1280/0168/files/bichhoo_film_video_song.pdf
    • https://cdn.shopify.com/s/files/1/0429/8863/4266/files/watertight_marketing.pdf
    • https://cdn.shopify.com/s/files/1/0428/0611/6511/files/mental_health_hotline_ringtone.pdf
    • https://cdn.shopify.com/s/files/1/0429/7680/5023/files/9554453205.pdf
    • https://cdn.shopify.com/s/files/1/0437/5805/9671/files/ruroxipivuke.pdf
    • https://cdn.shopify.com/s/files/1/0436/7400/9753/files/john_deere_parts_catalog.pdf
    • https://cdn.shopify.com/s/files/1/0435/3350/0565/files/72504938079.pdf
    • https://cdn.shopify.com/s/files/1/0435/8687/9651/files/25643721503.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85755015361.pdf
    • https://cdn.shopify.com/s/files/1/0447/6187/4583/files/epa_608_test_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/matam.pdf
    • https://cdn.shopify.com/s/files/1/0432/9252/4702/files/bejedoxunikelu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8488/1824/files/21326287082.pdf
    • https://cdn.shopify.com/s/files/1/0429/1664/2975/files/wuzuf.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_off00008d6f.bin
f80f8fb6e936d3c2367e1fe08d5c3e97d9da2575617197c3f6bd2da6a5e99252
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D6F 5188 bytes
font_01_sfnt_off00009f0b.bin
b63dc85248b8123830bbd423943775b573845964a5ac1bf74dff41c35a71f9de
pdf-font-stream PDF embedded font (sfnt) at offset 0x9F0B 9868 bytes