Malicious PDF — malware analysis report

Static analysis result for SHA-256 33b88bff77c06eb0…

MALICIOUS

PDF

40.7 KB Created: 2020-08-30 19:46:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3856cc4be0bb9f974c60a9ffa9098fb6 SHA-1: 6ebb30e4980bffb10d174eac89991b182f781e32 SHA-256: 33b88bff77c06eb06fb259a077f5b3efce2cae60586487bfe5f2ac07d0ae1b22
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded URLs, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, also contains the primary malicious URL. The presence of a large link farm suggests an attempt to distribute malicious content or phishing lures.

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=busquemos+perlas+escondidas+septiemb
    • https://static.usrfiles.com/ugd/e4ff69_061183ed292644858dbb28b00ebefd18.pdf
    • https://static.usrfiles.com/ugd/b8c837_9c5e88d230c347a6a819567be00ac3b9.pdf
    • https://static.usrfiles.com/ugd/b8c837_45c65d7afac4466f8a70de0837cfa42f.pdf
    • https://static.usrfiles.com/ugd/d4da64_ca7e4c8813fe4e0ea4b26109d7c6b474.pdf
    • https://static.usrfiles.com/ugd/b11f6d_e033ccc1aa904e36b20f6862115124f6.pdf
    • https://static.usrfiles.com/ugd/b8c837_e98a78be759f4755a6cfcf6a87a56ff2.pdf
    • https://static.usrfiles.com/ugd/b8c837_d57344134b164c258fe2b9d3c8371ebc.pdf
    • https://static.usrfiles.com/ugd/b8c837_65f5a4aa69d9414ab67941a57846e3ee.pdf
    • https://static.usrfiles.com/ugd/f14cf6_6238c21bbeb34302805093df4e4a5a54.pdf
    • https://cdn.shopify.com/s/files/1/0433/9892/2392/files/19135231864.pdf
    • https://cdn.shopify.com/s/files/1/0435/2881/4741/files/wotaduwapagi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xovigaza.pdf
    • https://cdn.shopify.com/s/files/1/0440/1859/8038/files/vitonabinukizigepuxoju.pdf
    • https://cdn.shopify.com/s/files/1/0438/2470/9782/files/61326291822.pdf
    • https://cdn.shopify.com/s/files/1/0433/6808/7701/files/cover_the_world_with_love_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0433/5344/0414/files/caterpillar_3306_diesel_generator_manual.pdf
    • https://cdn.shopify.com/s/files/1/0461/7846/7994/files/sugupubururif.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tuwaz.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000601e.bin
e27e51788453beb4e3bc2db0cf7cde3572650885dd2278e62460c177d7ac8775		 pdf-font-stream PDF embedded font (sfnt) at offset 0x601E 5536 bytes
font_01_sfnt_off000072d1.bin
c44bfc87ede8ad7ab0f2f1223555c86a482c17af00d5815fdc85c793800858f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72D1 10732 bytes

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