Malicious PDF — malware analysis report

Static analysis result for SHA-256 60ebc0bb1a3e5dcb…

MALICIOUS

PDF

44.0 KB Created: 2020-09-03 17:06:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d360ec67719fb57db02e6db19ff0abf0 SHA-1: 0a8c63b4ee45caf51f6ad510d0766d6b4719113a SHA-256: 60ebc0bb1a3e5dcb6c9f2e52ddf9f72d9b3c511c78c88b9272e9841a37bd4ca1
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.link/wix?keyword=ahsay+obm+client', suggesting a lure to trick users into clicking the link. The presence of numerous other PDF links further supports the SEO link farm heuristic, indicating a potential attempt to drive traffic 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.link/wix?keyword=ahsay+obm+client
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/ace02d_413efabf29b74f2ca40d839ad681c969.pdf
    • https://static.usrfiles.com/ugd/912de2_75cbbbc26622417eb355f274bd61fa3b.pdf
    • https://static.usrfiles.com/ugd/df73ab_d7c89f34233d4a209c11d6089f086ee3.pdf
    • https://static.usrfiles.com/ugd/724fb5_00406bf851a540059305a9520a0c541e.pdf
    • https://static.usrfiles.com/ugd/269bb8_fb5c81bc7f1043308b787238b500b356.pdf
    • https://cdn.shopify.com/s/files/1/0430/9480/2581/files/33977964742.pdf
    • https://cdn.shopify.com/s/files/1/0437/4547/6762/files/beyond_compare_3_files.pdf
    • https://cdn.shopify.com/s/files/1/0463/0777/0528/files/58923150745.pdf
    • https://cdn.shopify.com/s/files/1/0428/5690/6918/files/nejepa.pdf
    • https://cdn.shopify.com/s/files/1/0432/7689/4372/files/10662875505.pdf
    • https://static.usrfiles.com/ugd/5b9365_692b2a35323a43a7b920df67a029b697.pdf
    • https://static.usrfiles.com/ugd/8b4172_7f7a5dd53a1349c49ca407b137fc01f4.pdf
    • https://static.usrfiles.com/ugd/87fdc7_d71a8483884645d6aa86ebe3ae8b6881.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006fae.bin
85c650aaa1aacc4c59035720c88da2ca6a86a92221411afa62bb92bdf0cde5db
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FAE 5176 bytes
font_01_sfnt_off0000812f.bin
c0bed1320d711bbfd6dbd6335cfed419dc51ba08f2e081aae96571450b8469d2
pdf-font-stream PDF embedded font (sfnt) at offset 0x812F 10052 bytes