Malicious PDF — malware analysis report

Static analysis result for SHA-256 73d98bf6696e73a9…

MALICIOUS

PDF

40.9 KB Created: 2020-09-01 01:51:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d5f4ad8f47d7d145a7a69b6975ddf4df SHA-1: 2b787824b8b42f06457803aad51b8aba8cdbcaaf SHA-256: 73d98bf6696e73a9ec034c71222dc08245200b4bea005ffea3ec20dcaae92122
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to harmful content. The document body, though heavily obfuscated, contains the same malicious URL. The presence of numerous external PDF links suggests a link farm or SEO manipulation tactic, likely to obscure the primary malicious intent.

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.cc/wix?keyword=payaliya+bajni+lado+piya+song++mp4
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/0a052f_c6cb350a875a421e97f03d67b9861067.pdf
    • https://static.usrfiles.com/ugd/1cfe37_1b9ccc4a6d22450f80be7853d49f7f99.pdf
    • https://static.usrfiles.com/ugd/b8c837_a5e70e157be746149adf42f7af666429.pdf
    • https://static.usrfiles.com/ugd/6203b9_f04feea55405461f95b790473c65165e.pdf
    • https://static.usrfiles.com/ugd/97493d_dc33f63ab33a484997d506ad860bce6a.pdf
    • https://cdn.shopify.com/s/files/1/0433/3689/2584/files/pagirulagu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0130/6526/files/zitanuvafoze.pdf
    • https://cdn.shopify.com/s/files/1/0447/9841/0918/files/97119177837.pdf
    • https://cdn.shopify.com/s/files/1/0461/7938/5498/files/t_sql_ebook.pdf
    • https://cdn.shopify.com/s/files/1/0428/0372/4455/files/66676587047.pdf
    • https://static.usrfiles.com/ugd/83f04e_163284a7cdfa454392cd5805e988761f.pdf
    • https://static.usrfiles.com/ugd/b8c837_b98bb2402670435e9064fa46bdc5ad28.pdf
    • https://static.usrfiles.com/ugd/a640e9_ad7e27a44f3d4c7fa3430296a2a75061.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004513.bin
fb9374a8e24a5897de8a3dfa26c63664ced53f6779030a0692be469a8fb5458b
pdf-font-stream PDF embedded font (sfnt) at offset 0x4513 5588 bytes
font_01_sfnt_off0000580d.bin
7f6a353a8214b54a88f308abe2e1e4646bf99cf37565ad4cc70192ae5d744b32
pdf-font-stream PDF embedded font (sfnt) at offset 0x580D 9160 bytes
font_02_sfnt_off0000774c.bin
9e8409b995ac2b0bb76eb3eb8dd1c90fa55d1c1c8a40bb5daa08ca4080948d13
pdf-font-stream PDF embedded font (sfnt) at offset 0x774C 18776 bytes