Malicious PDF — malware analysis report

Static analysis result for SHA-256 00485d8ca991adc5…

MALICIOUS

PDF

72.4 KB Created: 2020-08-31 03:55:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1daefa3f5602fa75b6016f756deea62 SHA-1: 82dd7924b25bcb813cde686fa149c05e686ea17a SHA-256: 00485d8ca991adc5d3eb0d071f7e696be440da3245987966b3ac2c0b9c932713
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary malicious URL identified is https://ttraff.cc/wix?keyword=otoko+ichii+ni+odosarete+imasu, which is flagged as a malicious redirector. The document body contains garbled text but includes the title 'Otoko ichii ni odosarete imasu', suggesting a potential lure.

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/wix?keyword=otoko+ichii+ni+odosarete+imasu
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/8127dd_01cb83422e8a4deca293db5bac939ea3.pdf
    • https://static.usrfiles.com/ugd/82e28d_cdb5bfff71d94b06a57418b61bfc2047.pdf
    • https://static.usrfiles.com/ugd/b8c837_de70664321e94bd5ae1b2183916fa764.pdf
    • https://static.usrfiles.com/ugd/79e0dc_fb3335c53d0548328c1ff889f4f37f96.pdf
    • https://static.usrfiles.com/ugd/cbdbb6_b8e384265dc547c7b7b470695e9caa22.pdf
    • https://cdn.shopify.com/s/files/1/0448/3383/3122/files/mckinsey_quarterly_report.pdf
    • https://cdn.shopify.com/s/files/1/0432/2174/5823/files/57607639674.pdf
    • https://cdn.shopify.com/s/files/1/0461/9898/0757/files/gisuzuxitomu.pdf
    • https://cdn.shopify.com/s/files/1/0429/4492/1766/files/avpu_l_g.pdf
    • https://cdn.shopify.com/s/files/1/0431/3785/9735/files/apoptosis_and_cell_death.pdf
    • https://cdn.shopify.com/s/files/1/0428/1185/0918/files/19864858011.pdf
    • https://cdn.shopify.com/s/files/1/0434/8415/1974/files/zasofaxenetiruwofusibob.pdf
    • https://cdn.shopify.com/s/files/1/0433/1352/8987/files/6078810955.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009da8.bin
4e778271e9aad53afc69cb4b1a02e0ecb8701818435dcff19c51d653cd6082fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DA8 3172 bytes
font_01_sfnt_off0000a8ec.bin
42660a82eda5178fbe5db06781bf308184e55abab82a8b5026f627cac2f99982		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA8EC 5240 bytes
font_02_sfnt_off0000ba7b.bin
a81efffa75c967d1bc98efefb4ce87308f9622f6ae59e545ca068a02710c0409		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA7B 2284 bytes
font_03_sfnt_off0000c4bb.bin
3ebe475b08d0854254b9e25b3099389f31807e3218400e1a4a1a562712ee30f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC4BB 16124 bytes
font_04_sfnt_off0000f5ce.bin
b72b1ac1d27e05d67d549361189019ac874838398a8d555f16903867d2c9cabb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5CE 17964 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.