Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f937c1ee66d732f…

MALICIOUS

PDF

39.4 KB Created: 2020-09-12 06:58:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e80e22092bc9c5fbba2afee6ee52994 SHA-1: c6182a4fdf3be34ac06667c33855274a70842e54 SHA-256: 0f937c1ee66d732fba060823fe0bed5c6d51610120f5f4c38883022c18839a65
154 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded URLs pointing to external PDF files, a technique often used for SEO link farms or to distribute further payloads. One URL, 'https://ttraff.club/pify?keyword=delilah+tom+jones+sheet+music', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the sheer volume of links and the malicious redirector suggest an attempt to lure users to malicious content or manipulate search engine rankings.

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.club/pify?keyword=delilah+tom+jones+sheet+music
    • http://files.artypantsstudiott.com/uploads/1/3/0/7/130775229/wumoze.pdf
    • http://lasobowa.adyartcenter.com/uploads/1/3/0/7/130740490/2586706.pdf
    • http://files.soundcityreading.com/uploads/1/3/1/6/131606670/lewomakegapozamili.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/d7d6cd_cc2f346c1119499bbc0cfe59d29f5515.pdf
    • https://static.usrfiles.com/ugd/ad2ade_001637517b3c4d33a1f4e61011d20ac3.pdf
    • https://static.usrfiles.com/ugd/031dda_2ff88b930031456881a54530608f060f.pdf
    • https://static.usrfiles.com/ugd/de65f7_b92e4719f3cd436d836abb0cedb94146.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/41841620016.pdf
    • https://cdn.shopify.com/s/files/1/0432/4645/2899/files/cnc_turning_machine_design.pdf
    • https://static.usrfiles.com/ugd/f63f29_8f6cfab21f954f01b549bdb381742479.pdf
    • https://static.usrfiles.com/ugd/b8c837_25c13feeb3984f12b9e95bd3a6e0c349.pdf
    • https://static.usrfiles.com/ugd/739437_669b1de1006540048733c7b586474d77.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004e2c.bin
e120604a17b0a8f3b86197367f4ec2a0dcca0d31557d61b0a5bb69d70930bab1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E2C 4900 bytes
font_01_sfnt_off00005eb6.bin
38bd2bbebfaa1e8891a6ce64494b4832c7969d8162c33e6e17788d32ebf00913		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EB6 10500 bytes
font_02_sfnt_off00008298.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8298 4324 bytes

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