Malicious PDF — malware analysis report

Static analysis result for SHA-256 660f6cd2341b40de…

MALICIOUS

PDF

35.7 KB Created: 2020-09-01 14:12:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eed1272678c0b20049f2a91e52ab8a39 SHA-1: 91edddb1afa779d9339521c0c71e50a7ddb5c2f2 SHA-256: 660f6cd2341b40de51951b738807a12da6281c0b73b7972732716c61de46d309
162 Risk Score

Malware Insights

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

The PDF contains numerous links, including one identified as a malicious redirector, which is likely intended to lead the user to a malicious site. The presence of a 'download button' heuristic further supports the lure-based attack pattern. While no scripts were extracted, the PDF structure and embedded links strongly suggest a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=ciano+cf40+filter+manual
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/9544/8988/files/arroz_junto_con_habichuelas.pdf
    • https://cdn.shopify.com/s/files/1/0432/7292/9435/files/53526734595.pdf
    • https://cdn.shopify.com/s/files/1/0431/3461/5719/files/bakizoga.pdf
    • https://cdn.shopify.com/s/files/1/0432/7876/2140/files/the_bourne_ultimatum_watch_online_me.pdf
    • https://static.usrfiles.com/ugd/a18aa6_db4cb3f653b64552bf9e44704a167129.pdf
    • https://static.usrfiles.com/ugd/1ee69b_329f3918b9454f84915f982712456207.pdf
    • https://static.usrfiles.com/ugd/c0fca2_771c604176524251b53af6ca0f68dc5c.pdf
    • https://static.usrfiles.com/ugd/b8c837_8012811e613d4442b9bae7f5fa8b8c84.pdf
    • https://static.usrfiles.com/ugd/b8c837_c4b27a19a9c04f3e986963b242c21e9b.pdf
    • https://static.usrfiles.com/ugd/ef7b09_977215f2c4e14dbcb4a902658264a1f9.pdf
    • https://static.usrfiles.com/ugd/9ea91e_287209ecec4c470f98e8759bb299385d.pdf
    • https://static.usrfiles.com/ugd/de65f7_ea19e3820492467e887ad85132c5de26.pdf
    • https://static.usrfiles.com/ugd/3de8a6_02c9ebe7394c459ab365ce97b9d3c2b2.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_off00004ee4.bin
0eed7f47737232e7baf31b31847c8f1f78afd5892f3d88a754bb59a083788b13
pdf-font-stream PDF embedded font (sfnt) at offset 0x4EE4 4984 bytes
font_01_sfnt_off00005fc5.bin
59c5363ef5399bc149fc256cfd9a3a8908484268777a8ae0c3febe4bd6b0bdd1
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC5 10028 bytes