Malicious PDF — malware analysis report

Static analysis result for SHA-256 6037748f3f69e950…

MALICIOUS

PDF

38.8 KB Created: 2020-09-19 07:03:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c057f278585fe65c83f3e4b0f48ccb3 SHA-1: 96aab8986bf80581927318ba9a9fe1c85a4c23ec SHA-256: 6037748f3f69e950d919da5aadcd28a68a0b461dbacfea43bbb079e306966378
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to benign Shopify domains, but one critical link redirects to a known malicious infrastructure at `ttraff.me`. The document body, though heavily obfuscated, contains the text 'Lab puppies for sale in michigan craigslist' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of embedded URLs and the ML classifier's high confidence indicate malicious intent.

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/wix?keyword=lab+puppies+for+sale+in+michigan+craigslist
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/7316/6744/files/banking_and_financial_services_mba_notes.pdf
    • https://cdn.shopify.com/s/files/1/0438/3201/7058/files/16417191391.pdf
    • https://cdn.shopify.com/s/files/1/0433/2742/2632/files/42354489165.pdf
    • https://cdn.shopify.com/s/files/1/0432/5752/8480/files/twitter_discord_bot.pdf
    • https://cdn.shopify.com/s/files/1/0430/6088/7705/files/87071560336.pdf
    • https://b9f12fab-05a2-4bec-8d88-e138783c98e2.filesusr.com/ugd/565485_efd4b64f4d324fab9aaec80d22df2962.pdf?index=true
    • https://61546364-1382-47b0-b94a-43d59da9ae54.filesusr.com/ugd/4bdc6d_3ba30ce918b44f73a426b8dc72f53241.pdf?index=true
    • https://57964e0c-c93f-4fe2-8b7e-6c1d103b4662.filesusr.com/ugd/db80c5_50cd30629b1149dc9d77cd86906551a2.pdf?index=true
    • https://26c97594-cf4e-4fe0-ad54-90a7ceeda43b.filesusr.com/ugd/9ced5d_e190dacfa7724101958921fea3bf7b46.pdf?index=true
    • https://3c670d68-6653-46ff-b423-fb21822f8f73.filesusr.com/ugd/5c8b2f_47ea4fe5094f47829dd0d23a5f9c8b48.pdf?index=true
    • https://49640535-df1b-45ab-80c0-6d24a78f00d2.filesusr.com/ugd/dfb5f8_1c757ff74fb84a9bbf7b8c1dcf847bd2.pdf?index=true
    • https://76a55d29-1886-4328-affb-12c8e6ae8fdf.filesusr.com/ugd/724fb5_43c77b1ae1f3437cbb2e7b4d07ce61fa.pdf?index=true
    • https://08d6e59b-d66e-496d-989f-fa0239cdc6ee.filesusr.com/ugd/8c5bc8_52a61a51cbd0470cacfa73a81068942f.pdf?index=true
    • https://827e10ca-8d0a-4416-8d1e-ff02f4fa8d4a.filesusr.com/ugd/e2c6c1_a1f992ccae264e4f8a6adaa16ba9c2ff.pdf?index=true
    • https://a78ce1c8-86b3-422c-921d-18513b33081b.filesusr.com/ugd/76156b_315b53485a0941cf995297ca9d714be6.pdf?index=true
    • https://d9bb0c13-6b4d-4420-9064-c7dd3d14fa47.filesusr.com/ugd/5b1e3c_a9b6c79b3790471fb8434fa40275371b.pdf?index=true
    • 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_off00004c1f.bin
dbe58228acc0373c7c18241b8db79f8c1ade9f9142aeafb9ff273a2b1f0e549c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C1F 5392 bytes
font_01_sfnt_off00005e49.bin
11b9f64f12556ef084c45998fcd4cbece466a1773420eea7e574e6d9122bafb9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E49 9920 bytes
font_02_sfnt_off00008026.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8026 4324 bytes

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