Malicious PDF — malware analysis report

Static analysis result for SHA-256 0742e461da7215d2…

MALICIOUS

PDF

40.4 KB Created: 2020-09-03 05:03:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ca64468478414b208e26a1307335a47c SHA-1: 41e5f94f22e0d444fd96600d9cbdb7cb8d8824ca SHA-256: 0742e461da7215d2af162c7da7b52e6cc5d2e8d0a0983ff7661ac1343f7c8d59
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to a redirector service. The document body, while appearing to be about exercises, is likely a lure to encourage users to click on the malicious links. The presence of numerous links to external resources, including a redirector, suggests an attempt to drive traffic to malicious infrastructure.

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=body+parts+exercises+for+adults+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7750/9020/files/37789225223.pdf
    • https://cdn.shopify.com/s/files/1/0433/4940/9960/files/cowboy_bebop_artbook.pdf
    • https://cdn.shopify.com/s/files/1/0447/0325/2636/files/10496027414.pdf
    • https://cdn.shopify.com/s/files/1/0435/4523/1515/files/luwavidane.pdf
    • https://cdn.shopify.com/s/files/1/0432/4353/6541/files/tazevofadomaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/9536/7585/files/dolobazerusigisadogasilog.pdf
    • https://cdn.shopify.com/s/files/1/0433/7503/4520/files/xegigufuk.pdf
    • https://cdn.shopify.com/s/files/1/0431/4205/4048/files/4154809790.pdf
    • https://cdn.shopify.com/s/files/1/0432/0395/2803/files/mass_effect_1_face_code.pdf
    • https://cdn.shopify.com/s/files/1/0433/7437/9164/files/12801033896.pdf
    • https://cdn.shopify.com/s/files/1/0431/6626/9600/files/gitalobufiwaj.pdf
    • https://static.usrfiles.com/ugd/85d67f_d53dd6e60dd44830a4ceb798efc3ec04.pdf
    • https://static.usrfiles.com/ugd/253000_8a15257547d1406ca4a0d92a1263ec75.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_off00005fca.bin
f56a333b650cdab05d4a29e156d16ae1819b6e8298b9652ada81855e723e4dac
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FCA 5368 bytes
font_01_sfnt_off00007230.bin
33e60a27c26bb65960e93fa31cb53e160fa45f13b7d17a32dde6e35f7bc5c4d5
pdf-font-stream PDF embedded font (sfnt) at offset 0x7230 10180 bytes