Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce89c7d7e7d93e6a…

MALICIOUS

PDF

43.0 KB Created: 2020-08-29 02:10:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07aa590a84fb07f6156f6d16dc48d2e9 SHA-1: 47468bb70ed702eec6bfc91a4fd925117e7bbe89 SHA-256: ce89c7d7e7d93e6a3703065fdd0c45968d8473c55da21fda47483d2fbdee035b
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one identified as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm designed to manipulate search engine results and drive traffic to potentially harmful sites. No scripts were extracted, but the sheer volume of links suggests a delivery mechanism for phishing or malware.

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=buyers+guide+salina+ks+rentals
    • https://static.usrfiles.com/ugd/b8c837_4c6641363833409b82816d758d0509e3.pdf
    • https://static.usrfiles.com/ugd/b8c837_2762b56172ef4ef8bb40c865dfa9f22b.pdf
    • https://static.usrfiles.com/ugd/b8c837_279ef81744504a499650d983e3ec846b.pdf
    • https://static.usrfiles.com/ugd/b8c837_15ae9e963e33445f9054003f58f5daca.pdf
    • https://static.usrfiles.com/ugd/b8c837_fef15c207046477da26dab0b3f1520b1.pdf
    • https://static.usrfiles.com/ugd/b8c837_1a3ecd10e2ae41c4a38f2cb00ddd1fec.pdf
    • https://cdn.shopify.com/s/files/1/0462/3971/1392/files/android_app_development_on_windows_xp.pdf
    • https://cdn.shopify.com/s/files/1/0437/5642/1278/files/kalap.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xovigaza.pdf
    • https://cdn.shopify.com/s/files/1/0433/8837/1107/files/larozunejedokuxoje.pdf
    • https://cdn.shopify.com/s/files/1/0435/5502/9141/files/zutivevukelazotatimob.pdf
    • https://static.usrfiles.com/ugd/b8c837_5bea4a461d9d497e95025f9ffc078a22.pdf
    • https://static.usrfiles.com/ugd/b8c837_41dbeb698bd24e83b59ff60dc4f5f003.pdf
    • https://static.usrfiles.com/ugd/b8c837_3872781a27ec40df8fe96473d4beda52.pdf
    • https://static.usrfiles.com/ugd/b8c837_1d9bee09b579481d9e3146f0052d6d1c.pdf
    • https://static.usrfiles.com/ugd/b8c837_dd4de72e93eb4c70991de63e2712227d.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d44.bin
2bda9eb4ff1c237ecfff7f667e4f96dc124598e40e5713bda3a667a6903a9d2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D44 4980 bytes
font_01_sfnt_off00006e45.bin
b174fe9f058bce9fdb77e2cc576c7c6d8abed30eb05df610d60808d1824e30b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E45 10128 bytes
font_02_sfnt_off0000910e.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x910E 4324 bytes

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