Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b8a4f28b9101aa4…

MALICIOUS

PDF

35.7 KB Created: 2020-09-06 10:51:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec3581fc6c0cb609a0c7fff328f9b383 SHA-1: 611ee5da5262737ff029b7881b3879792ebda218 SHA-256: 7b8a4f28b9101aa47b82d575b20eb929d1041505f14072059d04c7fe7b38fe65
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service known for malicious activity. The document body, though heavily obfuscated, contains text suggesting a lure related to movie songs, likely to entice clicks on the malicious links. The primary malicious IOC is the redirector URL, which is designed to lead users to further malicious content.

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.link/wix?keyword=premabhishekam+telugu+old+movie+songs
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/b6aaa0_9fb7257ac980401dbd02c33c9c581e7f.pdf
    • https://static.usrfiles.com/ugd/a8c229_5b92fef6e283449b8ce0e953e61c4bf3.pdf
    • https://static.usrfiles.com/ugd/ab5adf_88879774cc25476aa481934812e83bb0.pdf
    • https://cdn.shopify.com/s/files/1/0428/7086/6079/files/gift_certificate_samples_free_templates.pdf
    • https://cdn.shopify.com/s/files/1/0431/0731/9965/files/mapa_cantabria_turismo.pdf
    • https://static.usrfiles.com/ugd/08fe48_13b50a0c6c244547ad3fd0f8d39533a7.pdf
    • https://static.usrfiles.com/ugd/868401_15af658d9b5d4e3bbac765d0f8a8449a.pdf
    • https://static.usrfiles.com/ugd/754d94_ebfe152c13cc497b990a51828ace5d8b.pdf
    • https://static.usrfiles.com/ugd/0a0016_fc003c0c622b4afa8d4d39c9fe8fdaec.pdf
    • https://cdn.shopify.com/s/files/1/0436/4782/8133/files/mac_addresses_manufacturer.pdf
    • https://cdn.shopify.com/s/files/1/0452/3789/5325/files/73607532503.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_off0000414d.bin
c41b64e84db548f4fc6200f57a5f68374955f26348fa691abfa0e13fd167eab8
pdf-font-stream PDF embedded font (sfnt) at offset 0x414D 5388 bytes
font_01_sfnt_off0000536b.bin
d61a6367f4ffae82b70114af679549f953c61a60a021aafdd821f1a78a55a1d4
pdf-font-stream PDF embedded font (sfnt) at offset 0x536B 9492 bytes
font_02_sfnt_off000073c2.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x73C2 4324 bytes