Malicious PDF — malware analysis report

Static analysis result for SHA-256 44da03daf7475a49…

MALICIOUS

PDF

48.1 KB Created: 2020-08-31 09:12:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2eaae180d4f755e7cec159033eb322de SHA-1: dbe515f492883e0e1c2233dbfde7bb03813af72b SHA-256: 44da03daf7475a494eaa9fc4d9975b257fdf38f09893416d288a9e4cfc220c43
152 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to the presence of a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL https://ttraff.me/wix?keyword=boogie+woogie+piano+sheet+music+free, which is flagged as malicious. The heuristic PDF_SEO_LINK_FARM indicates a link farm, likely intended to manipulate search engine results and lure users to malicious sites.

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.me/wix?keyword=boogie+woogie+piano+sheet+music+free
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/motorola_surfboard_sbg6580_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/9137/8854/files/79926132271.pdf
    • https://cdn.shopify.com/s/files/1/0427/5198/3772/files/59192882979.pdf
    • https://cdn.shopify.com/s/files/1/0438/2588/9442/files/69869647771.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6166/files/free_violin_sheet_music_greensleeves.pdf
    • https://cdn.shopify.com/s/files/1/0435/1967/2472/files/96007493333.pdf
    • https://static.usrfiles.com/ugd/efb3f0_a497e61af20b4ff78a63be27354b3838.pdf
    • https://static.usrfiles.com/ugd/b8c837_47cf9e6eac244b3f9003590006603f2f.pdf
    • https://static.usrfiles.com/ugd/a48928_4920df726732418c889ed4a54a0aea37.pdf
    • https://static.usrfiles.com/ugd/8ab72e_f828a8381cf44161923c034cdf501f9c.pdf
    • https://static.usrfiles.com/ugd/b8c837_2f68eb444f0f46489efea14ce3ee0019.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_off00005d58.bin
00b05a10e948801926864bd1e0a387ef3c1585630836406cada283489de1cf73
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D58 5540 bytes
font_01_sfnt_off00007015.bin
8b7c849a8ff870d4f86db55dde8b1e7cea162ab4d6a0b10316ec4e9f547a72ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x7015 14828 bytes
font_02_sfnt_off00009e37.bin
e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15
pdf-font-stream PDF embedded font (sfnt) at offset 0x9E37 16204 bytes