Malicious PDF — malware analysis report

Static analysis result for SHA-256 804999536c33dc45…

MALICIOUS

PDF

45.5 KB Created: 2020-08-29 21:03:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e9492754a0beeac629824a9f138030f9 SHA-1: 510fff8591b81a2e979d70590f11f1054d3d3a68 SHA-256: 804999536c33dc45d9c883a4a949e0c284d60bac94d436284e1985ecebf90479
162 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a redirector to malicious infrastructure. The ML classifier strongly indicated maliciousness, and the presence of a 'Download Now' lure further supports a phishing or scam attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site, likely for further exploitation or credential harvesting.

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.com/wix?keyword=printable+50+yard+zero+target+iron+sights
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/d01287_769ce9a67d69494eb1e2d533d15514b3.pdf
    • https://static.usrfiles.com/ugd/b8c837_71f563edebbe41209750c9d1d639ab3c.pdf
    • https://static.usrfiles.com/ugd/b8c837_847600236a9d42ee85982da61d0b7367.pdf
    • https://static.usrfiles.com/ugd/b8c837_1797a17a8321472e953d95c1a1e07588.pdf
    • https://static.usrfiles.com/ugd/b8c837_daf4ec05f5bf402faf6d38e30f2777ea.pdf
    • https://static.usrfiles.com/ugd/b8c837_438e1362bc0744e18a14f7939ea4c637.pdf
    • https://cdn.shopify.com/s/files/1/0433/7437/9157/files/fawiveti.pdf
    • https://cdn.shopify.com/s/files/1/0434/7835/2034/files/numeju.pdf
    • https://cdn.shopify.com/s/files/1/0429/0953/2323/files/5660701643.pdf
    • https://cdn.shopify.com/s/files/1/0450/9663/2472/files/54241843981.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/54729765263.pdf
    • https://static.usrfiles.com/ugd/b58d21_45611847b49d421eb8698e7ce84390d8.pdf
    • https://static.usrfiles.com/ugd/98e298_67e52138da664486a28343231b6a834c.pdf
    • https://static.usrfiles.com/ugd/c836c3_a7bad155d16a45ccb28d16c5b4469438.pdf
    • https://static.usrfiles.com/ugd/b8c837_bfe44046cfd9472a99c9ef7c59baaaf9.pdf
    • https://static.usrfiles.com/ugd/b8c837_1c52407394504aaeba3a17284267aed0.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_off0000723d.bin
f7faa6b5767a42a071dcb3a164ddf2b8e594c301679e3341d80f02692d656904		 pdf-font-stream PDF embedded font (sfnt) at offset 0x723D 5648 bytes
font_01_sfnt_off0000856b.bin
c53bd0dc05b413a5186a2a652109fe5e7c6f0d7ddf32638ef111b528415b7962		 pdf-font-stream PDF embedded font (sfnt) at offset 0x856B 10420 bytes

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