Malicious PDF — malware analysis report

Static analysis result for SHA-256 6aa577813f8a9871…

MALICIOUS

PDF

44.6 KB Created: 2020-08-31 05:53:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a71aec159d9bad06aad765d833ff6488 SHA-1: 67b14d2d11ace61b865b6fd00c7d30b757a34d58 SHA-256: 6aa577813f8a987168aa96f82b8e5a29562662d75474bece939e155b572a15c8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, many of which point to a link farm. One of these links, https://ttraff.me/wix?keyword=the+lone+ranger+and+tonto+fistfight, is flagged as a known malicious redirector. This suggests the document is designed to lure users to malicious websites, likely for further exploitation or phishing. The ML classifier also strongly indicated maliciousness.

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.me/wix?keyword=the+lone+ranger+and+tonto+fistfight
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/4479/7605/files/mazda_mpv_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/7865/5903/files/burma_film_video_songs.pdf
    • https://cdn.shopify.com/s/files/1/0434/3290/2806/files/temigezisila.pdf
    • https://static.usrfiles.com/ugd/b8c837_ee828a68bf90455ab07570f60e5fc815.pdf
    • https://static.usrfiles.com/ugd/b8c837_a3912266a6694ec7a4038ccb1f1778ca.pdf
    • https://static.usrfiles.com/ugd/55f640_808cc7d4f17c41ad933a03892f63a5e1.pdf
    • https://static.usrfiles.com/ugd/b85eb0_ecb1912110364f3a9ba6ff3bf8bf9578.pdf
    • https://cdn.shopify.com/s/files/1/0429/6641/7567/files/article_practice_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0430/3906/4225/files/avery_8163_template.pdf
    • https://cdn.shopify.com/s/files/1/0438/3368/8226/files/zijevazagatelanivezam.pdf
    • https://cdn.shopify.com/s/files/1/0429/0707/4719/files/81295657418.pdf
    • https://cdn.shopify.com/s/files/1/0431/1662/6082/files/tikulimuxixakujo.pdf
    • https://cdn.shopify.com/s/files/1/0438/3119/7856/files/learn_dance_videos_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/1353/6925/files/rijapuxaloxepado.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_off00007193.bin
60b724f03a0d3573a6b6aad10bb4a1ff98251b2211f686c5d6211e9b0096866c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7193 5120 bytes
font_01_sfnt_off000082f0.bin
07b745bcc7c43724da14112e0a40aa843f462760de5f1607b92bf21081e19ffa
pdf-font-stream PDF embedded font (sfnt) at offset 0x82F0 10144 bytes