Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ce65532aa2a0910…

MALICIOUS

PDF

55.0 KB Created: 2020-09-19 21:09:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 41f5f5d85870c49d22052df0a0537052 SHA-1: d62c96bbae8973d1da81e76529679ce634bc502f SHA-256: 0ce65532aa2a09107da60ec5ae50995204f4b29dea2285868546933ec9b409c8
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with several pointing to known malicious redirector infrastructure and link farms. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious content, potentially for phishing or malware distribution.

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=life+cycle+of+a+tiger+moth
    • http://jorufujoz.narakucostumes.com/uploads/1/3/1/4/131483281/9204606.pdf
    • http://nibezok.babeswithbabesfitness.com/uploads/1/3/0/7/130776485/pifale-xotanur.pdf
    • http://mubapujo.stmonicasparish.com.au/uploads/1/3/1/3/131380005/turoduvutimefaruwab.pdf
    • http://files.abqcraftshows.com/uploads/1/3/1/8/131856160/poxafes.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://8e0f09db-b0f6-4525-af05-a4389ded4393.filesusr.com/ugd/dcbeda_df10c5d0e81e4af299c70b4cc2651fa4.pdf?index=true
    • https://0e19db2d-7354-4798-a0ef-b0d644ddf8f4.filesusr.com/ugd/70e5f7_d0f7475b95094cf2b2630434afe10304.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0481/4051/7538/files/connotation_and_denotation_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0428/9508/1625/files/megigarosuxefikamurak.pdf
    • https://ffacb3f2-7f7c-426c-97e7-06704aaa412b.filesusr.com/ugd/e7e4a0_ecd602c55f424348a719963b93a2e5f2.pdf?index=true
    • https://72aca1f5-e894-4f84-85cb-204a6b362999.filesusr.com/ugd/9f69bd_03337cfd3cb8467dba7dccb21f2b0bfc.pdf?index=true
    • https://bae1a076-7111-460d-a44a-a5876bc42673.filesusr.com/ugd/8bc2a6_2873a69599bb43f5b308b0a21581b2c9.pdf?index=true
    • https://43fc01ab-aad1-42e0-98a4-2493dc45da65.filesusr.com/ugd/1b0481_0da82517453a47269fedc70a8ed309f7.pdf?index=true
    • https://0130b6d3-1290-4715-a84e-3ea0bc1a4e8c.filesusr.com/ugd/9f69bd_210544aee5cd4138bd44d8556a6b86a3.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007e49.bin
c79f83f802b03c03253fd2ce614acf8b64e6f58f083bba59d8a50638139562b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E49 5160 bytes
font_01_sfnt_off00008fc3.bin
9f1b982ffba3c71db3684b06c9806eae1dea60f049d818c8f3fc1ad3335ce9d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FC3 13008 bytes
font_02_sfnt_off0000ba11.bin
06d84a79787f49517cba9647d12dd77c675544b9e46e70dbd0c3ec2b8d2a160e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA11 16132 bytes

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