Malicious PDF — malware analysis report

Static analysis result for SHA-256 14748ea34059cc24…

MALICIOUS

PDF

49.7 KB Created: 2020-08-29 21:14:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 22c8d6657af04bb571091647944efd9d SHA-1: 34327b5123857fa39f36e280726249fde0bc6baf SHA-256: 14748ea34059cc24a34eaa4c34afaba980f7940a38248bfd2b8e4260f014ad40
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the presence of numerous external PDF links suggest a link farm or SEO manipulation tactic. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the nature of the links and the PDF structure point towards a malicious redirection attempt, possibly to a phishing site or to download further malware.

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=libro+narco+cdmx
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/b8c837_c1c55af24b0a4521af701ff3025378bd.pdf
    • https://static.usrfiles.com/ugd/b8c837_2d4f321424ae4301bfb7d00787c90909.pdf
    • https://static.usrfiles.com/ugd/067ecb_3e18297044ad4e1eb5dbd167ed626200.pdf
    • https://static.usrfiles.com/ugd/b8c837_543d269272a24a689d5f9a5bbf8546a8.pdf
    • https://cdn.shopify.com/s/files/1/0434/1248/8348/files/12260394609.pdf
    • https://cdn.shopify.com/s/files/1/0432/6991/4782/files/xipesarasaxumudubexo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/39792047860.pdf
    • https://cdn.shopify.com/s/files/1/0434/1714/1415/files/86587112109.pdf
    • https://static.usrfiles.com/ugd/b8c837_c57a39f659d94095ad8bea18dad3c719.pdf
    • https://static.usrfiles.com/ugd/b8c837_0fd2484c14884def85a5fb0ec61fbfc7.pdf
    • https://static.usrfiles.com/ugd/b8c837_b9560fe978a64ad4b5fc856066c55de3.pdf
    • https://cdn.shopify.com/s/files/1/0465/0821/2374/files/jizobesulixefumasukorune.pdf
    • https://cdn.shopify.com/s/files/1/0427/6148/6503/files/66346835861.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_off000079fb.bin
aad8df003ec903dda8552e5ff82a61d05be26ce3a786f48ab6e824699bee6cba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79FB 4612 bytes
font_01_sfnt_off0000896a.bin
db0ec7e4d348ac8ace184825e96a8bd335d3df6679b91dffcc6e6dac696e6898		 pdf-font-stream PDF embedded font (sfnt) at offset 0x896A 10144 bytes
font_02_sfnt_off0000ac0b.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC0B 4324 bytes

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