Malicious PDF — malware analysis report

Static analysis result for SHA-256 f98bf631e8aeba9c…

MALICIOUS

PDF

48.4 KB Created: 2020-09-07 19:57:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e9c4a504b1f267b2b836efe0fbed17e3 SHA-1: 572a3ca3cca6fbb9a777e9924fdc191591f5765a SHA-256: f98bf631e8aeba9cd3e4a90589eb1e9d047bce5effd7ba5fa6275208441f84d0
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure. The primary malicious URL identified is https://ttraff.club/pify?keyword=causes+of+poverty+in+nigeria+pdf, which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this URL and appears to be a lure related to poverty in Nigeria. No scripts were extracted, but the PDF structure itself is indicative of a phishing or redirection attempt.

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.club/pify?keyword=causes+of+poverty+in+nigeria+pdf
    • https://static.usrfiles.com/ugd/cc207a_34a1af50684f4bbd97ae27bba610d264.pdf
    • https://static.usrfiles.com/ugd/21e6f2_06599d69cdd5411d914177f88f42194c.pdf
    • https://static.usrfiles.com/ugd/1cc777_0791f06785e64cb2ba77945d3e58d973.pdf
    • https://cdn.shopify.com/s/files/1/0436/9275/3049/files/traders_guide_johnstown_pa.pdf
    • https://cdn.shopify.com/s/files/1/0431/1701/9292/files/81344274979.pdf
    • https://cdn.shopify.com/s/files/1/0431/1672/4386/files/dasiganigajatewigetufiwa.pdf
    • https://cdn.shopify.com/s/files/1/0441/2915/7272/files/58599935009.pdf
    • https://cdn.shopify.com/s/files/1/0432/2961/0141/files/diabetes_guideline_2019.pdf
    • https://cdn.shopify.com/s/files/1/0432/4674/7803/files/android_nougat_google_play_services_keeps_stopping.pdf
    • https://cdn.shopify.com/s/files/1/0439/4713/1035/files/71802580889.pdf
    • https://cdn.shopify.com/s/files/1/0430/8975/6311/files/garmin_gpsmap_942xs_template.pdf
    • https://cdn.shopify.com/s/files/1/0432/7656/6684/files/skater_boy_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0431/4903/3640/files/augustinisme_politique.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f5a.bin
13d100d3b0208e374dd85aa3d1508474bf0d3ace90bf8fa62dadfdc15791f8a4
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F5A 5244 bytes
font_01_sfnt_off00008146.bin
149738eb3e1d0bfb4a5732e89a115965e6f0cf3fc4971c694d3ce3619176544d
pdf-font-stream PDF embedded font (sfnt) at offset 0x8146 6148 bytes
font_02_sfnt_off00009125.bin
0487f4bd3b198670acf2b135411cae1590247025a4b8caa6f2aafb4e48925f98
pdf-font-stream PDF embedded font (sfnt) at offset 0x9125 10248 bytes