Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1a9ffdae3e6925d…

MALICIOUS

PDF

42.2 KB Created: 2020-08-30 19:46:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb51b969404a78a65b67b62f1ecd94c5 SHA-1: ffb9adf9dcc49f24f4fb72b00bf55063b6ddc5d3 SHA-256: e1a9ffdae3e6925d74d4ee74c696bafbb08e87506cdae465dfa1ce595b1c9888
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass of external links, many of which point to a redirector service. The primary malicious URL identified is https://ttraff.ru/wix?keyword=luigi%2527s+mansion+dark+moon+gems, which is flagged as a malicious redirector. The document body and embedded links suggest a lure related to game content to entice users to click through to malicious infrastructure. No scripts were extracted, limiting the analysis of direct payload execution.

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/wix?keyword=luigi%2527s+mansion+dark+moon+gems
    • https://static.usrfiles.com/ugd/b8c837_6401ab7b9a0b4dbfb2b6b0b224b68a52.pdf
    • https://static.usrfiles.com/ugd/b8c837_39e6caa1872b43a28dbce8683b806f40.pdf
    • https://static.usrfiles.com/ugd/b8c837_1c6863ba88144bb3a23b51bf74ff5727.pdf
    • https://cdn.shopify.com/s/files/1/0432/6552/3862/files/barron_sat_chemistry.pdf
    • https://cdn.shopify.com/s/files/1/0430/0334/7098/files/gobabuxaxojurabivujaruton.pdf
    • https://cdn.shopify.com/s/files/1/0431/7036/5602/files/free_html_responsive_table_templates.pdf
    • https://cdn.shopify.com/s/files/1/0434/9722/6402/files/fugoxaxetajuligokenur.pdf
    • https://cdn.shopify.com/s/files/1/0432/8531/5744/files/puzolokazisujitajaxopale.pdf
    • https://cdn.shopify.com/s/files/1/0440/5025/1941/files/2606199059.pdf
    • https://cdn.shopify.com/s/files/1/0463/0478/8642/files/nasoligorami.pdf
    • https://cdn.shopify.com/s/files/1/0438/5911/6182/files/70468262955.pdf
    • https://cdn.shopify.com/s/files/1/0433/6487/6444/files/pipekotegezudu.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/risururek.pdf
    • https://cdn.shopify.com/s/files/1/0433/4954/1013/files/10569553009.pdf
    • https://cdn.shopify.com/s/files/1/0431/4673/9866/files/toxafolo.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_off00006827.bin
e7aca324a079fbe7dbb164008ec54d80d56af7993b0122388dca63bb47c5fa11
pdf-font-stream PDF embedded font (sfnt) at offset 0x6827 5152 bytes
font_01_sfnt_off0000799d.bin
2973964dc0a24005a85922f39a6b8e23aceb591f7dc3100689ed92ff25ad1a31
pdf-font-stream PDF embedded font (sfnt) at offset 0x799D 10052 bytes