Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d810d98794bee69…

MALICIOUS

PDF

55.8 KB Created: 2020-08-31 00:52:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e000c581d7805d5eeeba00173fdaf650 SHA-1: 0487ee4927fec02a1245fa918b03126ecc52f10d SHA-256: 5d810d98794bee69f5d5c07ac21a695d23a52c71e8f47b4acef3fae56b979060
154 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, with a primary link directing to a known malicious redirector. The document body, though heavily obfuscated, contains text suggesting it is a lure for "spirited away piano sheet music pdf", likely to trick users into clicking the malicious link. The ML classifier strongly indicated maliciousness, and the presence of a malicious redirector URL confirms a phishing or redirection attempt.

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.com/wix?keyword=spirited+away+piano+sheet+music+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • https://static.usrfiles.com/ugd/bae363_aedb5b6b9225483bbe6eefc18e99b606.pdf
    • https://static.usrfiles.com/ugd/8b9728_f6dafcedbf954a8ebacfd1c61f9873bd.pdf
    • https://static.usrfiles.com/ugd/fd3290_82c06af270a74346bba064e825c71bc6.pdf
    • https://static.usrfiles.com/ugd/217d68_3aba550f43204886ab297ef4eadde9c7.pdf
    • https://static.usrfiles.com/ugd/6f58fb_46290babac8b484da7f0d305bbeac997.pdf
    • https://static.usrfiles.com/ugd/b8c837_c3460b67cc904d5e8a9dc6a07e194a2f.pdf
    • https://static.usrfiles.com/ugd/b8c837_1047222140094212abc2e0fb59586faf.pdf
    • https://static.usrfiles.com/ugd/8ba634_2dd6a02cec59414f953d4f7ca886643e.pdf
    • https://static.usrfiles.com/ugd/b8c837_b5a9a028e0b644cd8d98e93a5652333a.pdf
    • https://static.usrfiles.com/ugd/02beb7_4fc7ca3e14b44242aeecb6d8682f6afc.pdf
    • https://static.usrfiles.com/ugd/93c935_7fda79e8af1b4620ba72948aae5c81a4.pdf
    • https://static.usrfiles.com/ugd/b8c837_7eaab494c2c649598140e8a8cbc426e2.pdf
    • https://static.usrfiles.com/ugd/902d29_a6e7ae09a4834624bca63b6c90d9022d.pdf
    • https://static.usrfiles.com/ugd/fd3290_d89c1484b2f94f739653ec41ffda849c.pdf
    • https://static.usrfiles.com/ugd/b8c837_e9a5f1c605a6426e87f9e7d95393b706.pdf
    • https://static.usrfiles.com/ugd/41a0b6_d145f97cdd864de7bce6bdee37ff6d82.pdf
    • https://static.usrfiles.com/ugd/d4da64_43b5ce57f3404f15be3f502222c88f6a.pdf
    • https://static.usrfiles.com/ugd/b8c837_cbde0697eade453e89748eba8e4cc329.pdf
    • https://static.usrfiles.com/ugd/cb4a18_95cfe57b11a6491fb2233bd3c625dca3.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://www.gnu.org/licenses/gpl.html

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000697f.bin
0199829d1585e0e593de1622953df9d4508308c523b54572b6dfc93db6e31673		 pdf-font-stream PDF embedded font (sfnt) at offset 0x697F 4700 bytes
font_01_sfnt_off000079e4.bin
fbade8ac397504bede0dd6eaf1a794af73cfdd250f268c2f35ba7acaf94a028e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79E4 5660 bytes
font_02_sfnt_off00008d02.bin
e210351eef6825c75b56cbffaaa30e9a4b12df731b151ecc4dd18f4392b9da51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D02 7004 bytes
font_03_sfnt_off00009f89.bin
c722adecab4d6868da2bebb42fe3c4cd7a976732a49604945dd868e2518cd2ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F89 15208 bytes

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