Malicious PDF — malware analysis report

Static analysis result for SHA-256 104a1e4cbfd0d397…

MALICIOUS

PDF

50.5 KB Created: 2020-08-09 04:55:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e20e34dd2c837287b27f63772ad1155 SHA-1: 6ee0a1079fa7d418fc0e61ec382e374642ecf94d SHA-256: 104a1e4cbfd0d397d2005df631f6023ef19a9d040094f19240623f325fdf1be6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, disguised as a 'Marvel movies list in pdf'. The document body is heavily obfuscated but contains references to the malicious URL and numerous other PDF links, suggesting a link farm or redirection attempt. 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.cc/pify?keyword=marvel+movies+list+in+pdf
    • http://zaguti.dkroeedteam.com/uploads/1/3/1/4/131407995/9567b4.pdf
    • http://lapux.clpearsondesigns1.com/uploads/1/3/1/0/131071243/ranokutokijexo-tusawevogif-pugazez-tomaxosujutezu.pdf
    • http://files.huntersvillelawyer.com/uploads/1/3/1/4/131454523/5274edf52dac71.pdf
    • http://files.henrikbachmann.com/uploads/1/3/1/8/131871740/fizezegomesoz-pigonibexudetak-renokuvimenas-tojinuwazek.pdf
    • http://tuloma.pdxfastpitch.com/uploads/1/3/0/7/130776262/7622181.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/6972/5080/files/ntn_spherical_roller_bearing_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0438/2644/6496/files/5932082820.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kupenase.pdf
    • https://cdn.shopify.com/s/files/1/0430/7881/1797/files/amrita_pritam_poems_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0436/9671/7977/files/72860238138.pdf
    • https://cdn.shopify.com/s/files/1/0433/1218/5499/files/vojixozufi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/6565103434.pdf
    • https://cdn.shopify.com/s/files/1/0431/7573/9560/files/58140682124.pdf
    • https://cdn.shopify.com/s/files/1/0428/6644/2406/files/jozumokaxexagamilofoge.pdf
    • https://cdn.shopify.com/s/files/1/0432/8026/9477/files/gidagubatiwaguja.pdf
    • https://cdn.shopify.com/s/files/1/0433/5117/9416/files/buzinamedogosuxumi.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_off00008860.bin
def66d8128a401a73975db81c962217b5f21040145ad4484f103d8bff6145dc1
pdf-font-stream PDF embedded font (sfnt) at offset 0x8860 5252 bytes
font_01_sfnt_off00009a39.bin
285796506d09d9f0a0fa382e727ebf49c4015671c4bc7ea3ce9761e2f8f6f099
pdf-font-stream PDF embedded font (sfnt) at offset 0x9A39 10284 bytes