Malicious PDF — malware analysis report

Static analysis result for SHA-256 036f462613974c7c…

MALICIOUS

PDF

48.1 KB Created: 2020-08-30 17:50:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 226c6af00422db04a53dac8bc4b9afb6 SHA-1: 6b3f9803e207cf0c89dbad324e8c8c509ce2d7ad SHA-256: 036f462613974c7c89f97d396e4423a8c726ae34e706c77999a2fcc1f7d7f0f7
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which points to 'https://ttraff.link/wix?keyword=arma+2+oa+weapon+class+names'. The document body also contains this URL along with numerous other PDF links, suggesting a link farm or SEO poisoning 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.link/wix?keyword=arma+2+oa+weapon+class+names
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/2036/1629/files/jiworevuz.pdf
    • https://cdn.shopify.com/s/files/1/0434/0298/5621/files/17563119642.pdf
    • https://cdn.shopify.com/s/files/1/0432/2754/5763/files/bolosamosufena.pdf
    • https://cdn.shopify.com/s/files/1/0429/3243/7151/files/betty_azar_grammar_book.pdf
    • https://static.usrfiles.com/ugd/67f5f7_a2eb0773cee74a1899a947c95093ff50.pdf
    • https://static.usrfiles.com/ugd/912de2_463c7c2c1cfb4afbad714be1e07ecc7b.pdf
    • https://static.usrfiles.com/ugd/6cfc61_e75c33ec72c2443a868ba5520dc8acf7.pdf
    • https://static.usrfiles.com/ugd/b8c837_290324ef6a014476a21a3c596d73df96.pdf
    • https://static.usrfiles.com/ugd/f515ca_51c944fbb26c4a97afd68f1e76dfee8e.pdf
    • https://static.usrfiles.com/ugd/b8c837_0936679e5e8f45da934086d05a081a7a.pdf
    • https://static.usrfiles.com/ugd/73f3b0_0a4a8b4816254634b6bdbaa37a4cd9ee.pdf
    • https://static.usrfiles.com/ugd/e1d12c_e5f90c93dabf4ebd9006c701d143fbb3.pdf
    • https://static.usrfiles.com/ugd/9219f8_ef158a1b21f44531955f52b6dac1c6ab.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_off00006e61.bin
7cb39c3424eb8b61da9252e21d3b5046b796467e799205a67ac23e793cec43b8
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E61 5292 bytes
font_01_sfnt_off00008055.bin
ffef8cea1a3c5ab67a032aa82bad055a6eaf4a70840fc4bf64b53c70898c64cd
pdf-font-stream PDF embedded font (sfnt) at offset 0x8055 16068 bytes