Malicious PDF — malware analysis report

Static analysis result for SHA-256 68ac893ac295881a…

MALICIOUS

PDF

44.5 KB Created: 2020-09-01 21:39:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bca012ed5da2150a26bb78d970c02c72 SHA-1: 2724436bb73a96307acfdf8f9022875506e614af SHA-256: 68ac893ac295881a2e62ed2107479c976ac46ab63d61ccb0f1b92543388dce19
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a search query for nutritional information. The ML classifier strongly indicates maliciousness, and the PDF structure includes a large number of external links, many of which are benign Shopify links, likely part of a link farm to improve SEO for the malicious redirector. No scripts were extracted, but the presence of a malicious redirector URL is a strong indicator of 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.me/pify?keyword=boost+juice+nutritional+information+australia
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0436/9268/7513/files/troubleshooting_with_the_windows_sysinternals_tools.pdf
    • https://cdn.shopify.com/s/files/1/0432/4740/3168/files/65761639646.pdf
    • https://cdn.shopify.com/s/files/1/0460/3425/6036/files/84881927078.pdf
    • https://cdn.shopify.com/s/files/1/0431/4418/3974/files/talizuze.pdf
    • https://cdn.shopify.com/s/files/1/0431/2009/9488/files/ut_austin_course_planner.pdf
    • https://cdn.shopify.com/s/files/1/0463/3113/4113/files/one_piece_926.pdf
    • https://cdn.shopify.com/s/files/1/0431/6394/3067/files/79431281249.pdf
    • https://cdn.shopify.com/s/files/1/0432/9416/3109/files/sharh_aqeedah_tahawiyyah.pdf
    • https://static.usrfiles.com/ugd/628a76_0f5ba33fa3d94bb4a4b331f8984935b2.pdf
    • https://static.usrfiles.com/ugd/49be48_a61d6f5ea7414d6d9b640ff4f197fad4.pdf
    • https://static.usrfiles.com/ugd/b8c837_496c8eb36ba64e1a8770a0d32e39d74c.pdf
    • https://static.usrfiles.com/ugd/ce14f3_599685a9973d4926b60da41cf33f6ffb.pdf
    • https://static.usrfiles.com/ugd/e2c6c1_33ea0becea6f4ab19e1e95eda123805a.pdf
    • https://static.usrfiles.com/ugd/0aab01_e7c0b69050f948a9af8f23f5f86efea2.pdf
    • https://static.usrfiles.com/ugd/b910ae_248ebc37bf8a403ab448855411106a76.pdf
    • https://static.usrfiles.com/ugd/7603ae_0e159f39c25d4e2b8d79968851ba6f3a.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_off000061ed.bin
e57c626c1299f4a1e8066ab61481eadd9bf82fb5af2883f9af926b8a1cf07c56		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61ED 5032 bytes
font_01_sfnt_off000072f0.bin
e2052175ef4260d442238868af543a2ae25bd246e48d10208bace89211ef65c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72F0 10552 bytes
font_02_sfnt_off000096d1.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96D1 4324 bytes

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