Malicious PDF — malware analysis report

Static analysis result for SHA-256 145c68d908eb0abb…

MALICIOUS

PDF

63.7 KB Created: 2020-08-31 04:31:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32f1d3b8de69a0752ab7d27754ca7a41 SHA-1: 95f1c36abfae0781b4781875fcbe1ebb6b2f894d SHA-256: 145c68d908eb0abb4be719717276cf1bbfc7b1e758d5ab9c591dea2ca984277d
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one identified as a malicious redirector pointing to 'https://ttraff.cc/wix?keyword=300+stein+plaza+los+angeles+ca+90095'. The document also features a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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/wix?keyword=300+stein+plaza+los+angeles+ca+90095
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fulefevizurosojasi.pdf
    • https://cdn.shopify.com/s/files/1/0430/2074/6906/files/9577890557.pdf
    • https://cdn.shopify.com/s/files/1/0431/2511/2994/files/10356336721.pdf
    • https://cdn.shopify.com/s/files/1/0436/8993/5003/files/sapodon.pdf
    • https://static.usrfiles.com/ugd/353d00_fbe52ad8a1984a04b9a9e16f8a082483.pdf
    • https://static.usrfiles.com/ugd/b8c837_1e6f9280bff74ab08132e5d1f533c3a3.pdf
    • https://static.usrfiles.com/ugd/33a2e4_3cdd197a2e764e67a784f415785cf008.pdf
    • https://static.usrfiles.com/ugd/b58d21_3ae754e8223244688b04f5e706616143.pdf
    • https://static.usrfiles.com/ugd/516574_013f86011ea54c80b74cddd1bee227a4.pdf
    • https://static.usrfiles.com/ugd/764aaa_531eca46db984f7d91f482550268d118.pdf
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/cb_edits_background_png_images.pdf
    • https://cdn.shopify.com/s/files/1/0437/9413/7249/files/63496168624.pdf
    • https://cdn.shopify.com/s/files/1/0431/2937/2823/files/disefuxew.pdf
    • https://cdn.shopify.com/s/files/1/0435/5496/3617/files/free_christian_movies_for_mobile_phones.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_off0000ad98.bin
32b94711b359113539ef16d9e6f6130370848e414d2bb9fe15e82e60dcd92e72
pdf-font-stream PDF embedded font (sfnt) at offset 0xAD98 5548 bytes
font_01_sfnt_off0000c083.bin
053e1ca2a09ff4d73732272708b9d0bc6d76cc57eb420013e68e9896325b1bf9
pdf-font-stream PDF embedded font (sfnt) at offset 0xC083 16304 bytes