Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ba3397026de4f8d…

MALICIOUS

PDF

60.8 KB Created: 2020-08-20 09:47:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff97e14a530b86951d4509f81d8a1c11 SHA-1: b6812b32670c6fa97349ab2f7efc95e28bfe42f3 SHA-256: 0ba3397026de4f8d287589911617dac6ec1a02a7eec73b8ab443bec671c30c5a
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to PDF files hosted on Shopify, suggesting a link farm for SEO manipulation or to obscure malicious content. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is likely used to funnel victims to malicious sites or download further payloads. The ML classifier also strongly indicated maliciousness.

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/pify?keyword=museo+del+desierto+informacion+en+ingles
    • http://files.sandlotdublin.com/uploads/1/3/1/0/131070561/3061180.pdf
    • http://files.jnanosdds.com/uploads/1/3/1/4/131437792/6853961.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/5932/2778/files/inherited_disorders_of_carbohydrate_metabolism.pdf
    • https://cdn.shopify.com/s/files/1/0427/7764/1116/files/44442144094.pdf
    • https://cdn.shopify.com/s/files/1/0433/3905/5253/files/vikojofofar.pdf
    • https://cdn.shopify.com/s/files/1/0437/1241/3851/files/atmospheres_peter_zumthor.pdf
    • https://cdn.shopify.com/s/files/1/0434/7474/7558/files/vegovutikadunafukisi.pdf
    • https://cdn.shopify.com/s/files/1/0440/0293/4942/files/answering_interview_questions_on_confidentiality.pdf
    • https://cdn.shopify.com/s/files/1/0446/8667/2025/files/gre_vocabulary_words_with_pictures.pdf
    • https://cdn.shopify.com/s/files/1/0434/8094/0710/files/john_deere_2040_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/7438/8119/files/vusesipo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7108/6485/files/43969018233.pdf
    • https://cdn.shopify.com/s/files/1/0432/0693/4696/files/95208200335.pdf
    • https://cdn.shopify.com/s/files/1/0428/5680/8607/files/94303320102.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068da.bin
a30f9870a442ba04ecaf76230eb953caa675479c37e4326c9ba26349c5703847		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68DA 5344 bytes
font_01_sfnt_off00007aeb.bin
d6f45bfc81dab49f6918fbc9e4b29abe6e91e5b27c1a34546f83f99879bf2059		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AEB 15004 bytes
font_02_sfnt_off0000a964.bin
1187a4c653ae64c675e17dd83d7e59a8e2385d9e76f49ec5e267bb639b4cf703		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA964 11732 bytes
font_03_sfnt_off0000cfd2.bin
70f6bc6588804ba88bdf9a49e80364ade9bff97d252558046ba06cbbfdfeba47		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCFD2 16340 bytes

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