Malicious PDF — malware analysis report

Static analysis result for SHA-256 717cc074cf2dd171…

MALICIOUS

PDF

40.0 KB Created: 2020-08-30 14:05:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be023f6083faabd28009d71bb3aca972 SHA-1: 518130ae23241eb823c03f00c76c4c1320bfadda SHA-256: 717cc074cf2dd1710222b952bfb9c58af3947e734e1b5b37a9eab488894aa36c
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to a URL containing 'fallout 76 tank build'. This suggests a lure to a malicious site, likely for phishing or malware distribution. The PDF also contains a large number of embedded links, many of which point to benign Shopify URLs, but the primary malicious link is the most concerning. No scripts were extracted, but the presence of embedded URLs and the malicious redirector link strongly indicate a phishing or social engineering attack.

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=fallout+76+tank+build
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0450/5645/8904/files/normal_probability_distribution_function.pdf
    • https://cdn.shopify.com/s/files/1/0430/7140/6237/files/bivesexubaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/9451/5614/files/zozojuzen.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/jadoxixi.pdf
    • https://cdn.shopify.com/s/files/1/0432/7899/1518/files/lusulijutimobo.pdf
    • https://static.usrfiles.com/ugd/b8c837_1318525437d04026a36bb8fd533469f4.pdf
    • https://static.usrfiles.com/ugd/756799_b02f82687685416f80ca46617065cd1c.pdf
    • https://static.usrfiles.com/ugd/b8c837_a8679ef925f6435684dc6b9c5758c7d9.pdf
    • https://static.usrfiles.com/ugd/b8c837_3fab33ffbd2242a4bfabee423553eb03.pdf
    • https://static.usrfiles.com/ugd/b8c837_9e1e337cd6fd4260911a757f1980cbd0.pdf
    • https://static.usrfiles.com/ugd/784815_b363e63e6f344d51bf638aec1b88c782.pdf
    • https://static.usrfiles.com/ugd/87b9a8_b7d8bd4c6e4a4e2e89f4fbedaf33d46d.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_off00005f41.bin
7310911013de694a79b945355a5e75b0155d20a0971ff174f6499ef181d9503b
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F41 4936 bytes
font_01_sfnt_off00007025.bin
0d9e73ddda6d5de8cc76fe99677e1f20f068cf26252ff6d79206265e91d0a9f9
pdf-font-stream PDF embedded font (sfnt) at offset 0x7025 10360 bytes