Malicious PDF — malware analysis report

Static analysis result for SHA-256 846dc7e98c217647…

MALICIOUS

PDF

42.8 KB Created: 2020-09-03 02:22:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed2ec1eac1ebe82e857dcd0d48bd78f5 SHA-1: 0a0a4518088e30fcf96345dad4234d9be36048c2 SHA-256: 846dc7e98c21764710b4ec30a422e782024be89985bef240b3d0a015de11168e
154 Risk Score

Malware Insights

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

The PDF contains embedded links and document body text that, when combined with heuristic firings, indicate a malicious redirector. The primary URL, 'https://ttraff.com/wix?keyword=air+fryer+cooking+guide', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to the lure 'air fryer cooking guide' and the malicious URL, suggesting a phishing or scam attempt.

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.com/wix?keyword=air+fryer+cooking+guide
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/2816/8359/files/37194486110.pdf
    • https://cdn.shopify.com/s/files/1/0441/0900/4952/files/widerugaxosumozuzenegowo.pdf
    • https://cdn.shopify.com/s/files/1/0429/2273/7820/files/mathematical_excursions_aufmann_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/5036/0232/files/engineering_mathematics_symbols.pdf
    • https://cdn.shopify.com/s/files/1/0439/5096/4904/files/36610749895.pdf
    • https://cdn.shopify.com/s/files/1/0445/8224/0420/files/arrange_online_free.pdf
    • https://static.usrfiles.com/ugd/9ff9b8_a75144a65e3c46c0964f5833f3a11504.pdf
    • https://static.usrfiles.com/ugd/e2f197_8858e9f138d84af987c1ed7e4e7312f3.pdf
    • https://static.usrfiles.com/ugd/c5d40f_9eee4c6e3a4848d6aab73c1b6f6e966e.pdf
    • https://static.usrfiles.com/ugd/e80f4c_5b9c4545f06943268574fc04a8f0cfee.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005de8.bin
1a8ee4d9113745b0edda72c18b300c121841d440588656a484af91944c6514c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DE8 4724 bytes
font_01_sfnt_off00006e03.bin
75b9d438ed8d4733786b2cb312b0d684b00ec1c596ba8a36dcf29e4458922ddf
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E03 10080 bytes
font_02_sfnt_off00009083.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x9083 4324 bytes