Malicious PDF — malware analysis report

Static analysis result for SHA-256 13ac6ed786054550…

MALICIOUS

PDF

39.9 KB Created: 2020-09-01 07:19:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2081e65a95ab3803cbe90e7c2b1b4391 SHA-1: b673094077ff5079edfc8e63c4973a0bd8e8e007 SHA-256: 13ac6ed786054550e419b912dbe42f0122d7a570be3817f32740515e8dff5e24
162 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm designed to drive traffic to malicious sites. The presence of numerous external PDF links and a critical redirector link firing strongly suggests a phishing or malicious redirection attempt.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=missguided+us+store
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_acdbb6ff422f4e5e854f4982dd587dd7.pdf
    • https://static.usrfiles.com/ugd/de02f3_76e597a5d48e4b2398b859b4209fbee6.pdf
    • https://static.usrfiles.com/ugd/b8c837_8614395f95f14a9492019aaa4f76754e.pdf
    • https://static.usrfiles.com/ugd/b65acf_759091c6cc0d406f8c1ead1331b9700b.pdf
    • https://static.usrfiles.com/ugd/4725f1_6352e9f56967491fa8649624ebc6f5ca.pdf
    • https://cdn.shopify.com/s/files/1/0437/3171/4202/files/brothers_songs_in_tamil_masstamilan.pdf
    • https://cdn.shopify.com/s/files/1/0441/1876/9816/files/tedeluranuxasoruduzogixej.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/zupazunulepebap.pdf
    • https://cdn.shopify.com/s/files/1/0462/5930/6645/files/filespace_premium_account_key.pdf
    • https://static.usrfiles.com/ugd/9b5f63_8678413172fe43e5a90202edc8446d1c.pdf
    • https://static.usrfiles.com/ugd/dad90e_e9c8ce9fc07a4a33b1aa9cdec7bc4ec5.pdf
    • https://static.usrfiles.com/ugd/2c608b_972c936416784066923e25e995a95486.pdf
    • https://static.usrfiles.com/ugd/b8c837_69eacfa2fd24478ab8177c7c07243d6e.pdf
    • https://static.usrfiles.com/ugd/6846fe_bd70cefd85e742f8ba6d66c2a6a762cb.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_off00005ef4.bin
b89ca0f6ecaf4cba6708190cfb6f60a086b7b6552e25ac69ffab95cd72b1e01b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EF4 4756 bytes
font_01_sfnt_off00006f39.bin
f9cd79d8314ccc3356ff649bd99d7f5c6d67008549bb8faa72b55aebfa67606d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F39 10604 bytes

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