Malicious PDF — malware analysis report

Static analysis result for SHA-256 1135f04027b2068d…

MALICIOUS

PDF

57.2 KB Created: 2020-08-31 03:37:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2bbd6cf7e1a53da6f9fe982dcd38649a SHA-1: ee8f7cf4cd8ecc939f8e08dd0184d07e57e22cdc SHA-256: 1135f04027b2068dc0972131a7457899e058d2a724470a9ccce8f8d1b333b31c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to a lottery and prize, consistent with an advance-fee scam. The presence of a link farm and a malicious redirector suggests an attempt to lead the user to malicious content or phishing pages.

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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.ru/wix?keyword=national+rifle+association+10+meter
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0459/9155/9327/files/warofemavisaj.pdf
    • https://cdn.shopify.com/s/files/1/0430/9614/6074/files/sawareragarajogakibojibuj.pdf
    • https://cdn.shopify.com/s/files/1/0432/6300/0736/files/lorasazuxudelaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/7616/5536/files/vapof.pdf
    • https://cdn.shopify.com/s/files/1/0434/9558/8002/files/sign_adobe_on_iphone.pdf
    • https://static.usrfiles.com/ugd/b8c837_fba2452068a84ca7a8008921feeaa2fe.pdf
    • https://static.usrfiles.com/ugd/b8c837_72adf701a3264599b5da7d98e2be5f8e.pdf
    • https://static.usrfiles.com/ugd/d17951_d9bc88c41c3a4bc9963cb8321b5e0812.pdf
    • https://static.usrfiles.com/ugd/b8c837_5f19b026a2444fb8a703bc85c9544f80.pdf
    • https://static.usrfiles.com/ugd/909b15_50a1ddc7204040b2945d0a0c158656e8.pdf
    • https://cdn.shopify.com/s/files/1/0439/0646/5947/files/gelatin_sheets_vs_powder.pdf
    • https://cdn.shopify.com/s/files/1/0433/7057/8070/files/41148550093.pdf
    • https://cdn.shopify.com/s/files/1/0433/7808/1959/files/bemosalelogarezasorof.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_off000095d9.bin
87ab4309bf60d1dbbc1f2afcc4b781caad1ec2941043fe632a56985563962cbd
pdf-font-stream PDF embedded font (sfnt) at offset 0x95D9 5188 bytes
font_01_sfnt_off0000a76a.bin
7f088936f4899efd22dedc7cf8d60cfcc33b2b94b0aabfb49df810b43da2a4a2
pdf-font-stream PDF embedded font (sfnt) at offset 0xA76A 15916 bytes