Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dd2505e8cd2f471…

MALICIOUS

PDF

42.1 KB Created: 2020-08-05 12:30:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 22d787d8342b3a2588eee36f2373752e SHA-1: 8649d60e7a2101be16dd6ba397c98ff1ef0cd63a SHA-256: 0dd2505e8cd2f4710994b591f2e4eb6ffe17e277b0b48ea23aa73430d887566a
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination. The document also hosts a large number of links to other PDFs, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs further supports a malicious intent to redirect users.

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.cc/pify?keyword=breadboard+connection+tutorial+pdf
    • http://files.positivefocushawaii.com/uploads/1/3/0/7/130739517/sawuxaved.pdf
    • http://files.cozykidsembroidery.com/uploads/1/3/1/4/131409170/ninebafakafekip.pdf
    • http://files.amesburyschoolcoalition.com/uploads/1/3/0/7/130739593/c02159ecdc.pdf
    • http://files.saxenalab.com/uploads/1/3/1/4/131406785/1940361.pdf
    • http://files.immaculataschool.org/uploads/1/3/0/8/130813317/feaac66b27ccab.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/5025/3979/files/php_xml_to_array.pdf
    • https://cdn.shopify.com/s/files/1/0433/7627/9702/files/22648589605.pdf
    • https://cdn.shopify.com/s/files/1/0427/7665/8087/files/91840433175.pdf
    • https://cdn.shopify.com/s/files/1/0433/5455/4533/files/55810068581.pdf
    • https://cdn.shopify.com/s/files/1/0436/1207/8243/files/60323358993.pdf
    • https://cdn.shopify.com/s/files/1/0431/9536/7585/files/povap.pdf
    • https://cdn.shopify.com/s/files/1/0430/3002/0247/files/25087237819.pdf
    • https://cdn.shopify.com/s/files/1/0430/5528/4378/files/tovutimifurikes.pdf
    • https://cdn.shopify.com/s/files/1/0433/2729/1544/files/4237153381.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/niriliruvurufuwupaku.pdf
    • https://cdn.shopify.com/s/files/1/0440/7230/4805/files/daryl_williams_pff.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_off000066c3.bin
ffecfa2920f4ebf0e2ea331b72ca36fe820439ca6683275b8544063b82a8a997
pdf-font-stream PDF embedded font (sfnt) at offset 0x66C3 5160 bytes
font_01_sfnt_off0000785a.bin
d8ad22d8562a631f35136b86dde00f9f3e397226909dee08d57baa5bb93b444a
pdf-font-stream PDF embedded font (sfnt) at offset 0x785A 10212 bytes