Malicious PDF — malware analysis report

Static analysis result for SHA-256 80b80859781cb7b1…

MALICIOUS

PDF

43.6 KB Created: 2020-08-30 04:29:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8eafc87d4692bfc17d3b082ce806b793 SHA-1: c06d1fe4d2c595fd1ca2855c90a7e2b2dcf265e4 SHA-256: 80b80859781cb7b12ca07057abef1eea904f350162e84f7c1351a99cf802a975
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'Kinect windows driver' and includes the malicious URL. The presence of numerous other PDF links suggests a link farm or SEO poisoning attempt, further indicating malicious intent.

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=kinect+windows+driver
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/0628/0355/files/example_of_job_application_letter.pdf
    • https://cdn.shopify.com/s/files/1/0430/6285/3794/files/77385677826.pdf
    • https://cdn.shopify.com/s/files/1/0449/5484/5352/files/flow_cytometry_report_sample.pdf
    • https://cdn.shopify.com/s/files/1/0429/2742/3654/files/69307802376.pdf
    • https://cdn.shopify.com/s/files/1/0440/6290/0374/files/final_fantasy_7_cue_file.pdf
    • https://static.usrfiles.com/ugd/b7082a_911a3b127d1d46f58eb8f97fe8616e40.pdf
    • https://static.usrfiles.com/ugd/b8c837_03f04a6c3653475ea7fac5a45a2e9289.pdf
    • https://static.usrfiles.com/ugd/0adedf_3d5fa478e75a49f0b7b42acce68a00f6.pdf
    • https://static.usrfiles.com/ugd/b8c837_3e7e3e65401943a5aa08e868718d254c.pdf
    • https://static.usrfiles.com/ugd/b8c837_6aab9125c07940f88d7cef672e60a019.pdf
    • https://static.usrfiles.com/ugd/d1c05f_67d30acf5a6943ba9ae03a370e4439ea.pdf
    • https://static.usrfiles.com/ugd/db93e9_a3ebbfd1c9a54b3280722d1c04c5f8a1.pdf
    • https://static.usrfiles.com/ugd/b444d4_432c50f9d1e342c0857a30aba8aad467.pdf
    • https://static.usrfiles.com/ugd/b8c837_ce165cd67ae64a659f15c55cebf987d1.pdf
    • https://static.usrfiles.com/ugd/b8c837_490aa790dd5a4d7a8d9506a8d4864a6d.pdf
    • https://static.usrfiles.com/ugd/b8c837_311c22bcd3a346988ed7ac3f2868541d.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e0e.bin
6867eaa74f390501e5284da2b443e4ddc0aa8d68194c1d21246a10a229a963a8
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E0E 4812 bytes
font_01_sfnt_off00007e8e.bin
08fed0f611b5344c83d20ecb3de3d5be9821c90d1307a9969b241ce6e8af0df9
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E8E 10216 bytes