Malicious PDF — malware analysis report

Static analysis result for SHA-256 0babc0885e8d4530…

MALICIOUS

PDF

48.0 KB Created: 2020-08-23 21:13:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5036a849447364306d39fa052d192da8 SHA-1: 576156e3e545506a005b4ed2b5d6346b0bbd1ece SHA-256: 0babc0885e8d4530a0b6290fb4d297487bc48e432621f941bcddf41c380871f4
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting an attempt to manipulate search engine results or lure users to malicious content. The ML classifier strongly supports the malicious verdict.

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=apple+compass+icon
    • http://files.outsiderartauction.com/uploads/1/3/1/4/131438784/a1b0bf.pdf
    • http://files.yorkminxters.com/uploads/1/3/1/0/131070151/vulejifexanu.pdf
    • http://files.piac.org.au/uploads/1/3/2/8/132814949/c5a0b1066.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/0634/5895/files/39582302019.pdf
    • https://cdn.shopify.com/s/files/1/0438/9902/7611/files/25454573902.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/84065179267.pdf
    • https://cdn.shopify.com/s/files/1/0431/8196/5474/files/42552166858.pdf
    • https://cdn.shopify.com/s/files/1/0437/5068/6874/files/a_soul_s_bane.pdf
    • https://cdn.shopify.com/s/files/1/0438/1949/9682/files/1160362900.pdf
    • https://cdn.shopify.com/s/files/1/0430/9696/5269/files/livre_assainissement.pdf
    • https://cdn.shopify.com/s/files/1/0436/6336/0153/files/community_investment_strategy_template.pdf
    • https://cdn.shopify.com/s/files/1/0433/5114/6649/files/tevuguxinipatar.pdf
    • https://cdn.shopify.com/s/files/1/0431/2255/7082/files/wordly_wise_book_8_lesson_9.pdf
    • https://cdn.shopify.com/s/files/1/0433/3341/9160/files/different_approaches_to_disaster_management.pdf
    • https://cdn.shopify.com/s/files/1/0434/6006/7480/files/insulin_lispro_davis_drug_guide.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_off00005fbf.bin
73c5bc3914b32542dda2b2a16dd25d924df19877b64d06dfcbc0866536006737		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FBF 4972 bytes
font_01_sfnt_off00007081.bin
fbf82ed4aac413221aa8ad5f29437faa338865196d9ddbb2bb8364db8eacefd7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7081 2264 bytes
font_02_sfnt_off00007a0a.bin
4b3b0ace270a151454b66855323d4fdaf6ecf5b9e3692e13ee104b817492a120		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A0A 10120 bytes
font_03_sfnt_off00009ce4.bin
92ca5277a07040a1118e6ffe557fff1b4332eaf15e577e4df2dfa25513d903e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CE4 16336 bytes

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