Malicious PDF — malware analysis report

Static analysis result for SHA-256 6edf6eca3812daa3…

MALICIOUS

PDF

45.9 KB Created: 2020-09-03 07:28:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c759c436ef1139fcaa857d5a3902128f SHA-1: 2be188a102021fffffa25eb8f98321ed4dcbcbf4 SHA-256: 6edf6eca3812daa393a1829ee9463ada7d640dfd76fee2735d48ff9c9071561f
154 Risk Score

Malware Insights

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

The PDF contains embedded links that lead to a redirector service, which in turn points to a Shopify URL. The document body text, though heavily obfuscated, contains the phrase '50th birthday invitation card template' and the malicious URL, suggesting a social engineering lure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms the redirection to known malicious infrastructure.

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/wix?keyword=50th+birthday+invitation+card+template
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/5561128363.pdf
    • https://cdn.shopify.com/s/files/1/0440/3026/3446/files/prayer_walk_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/8221/0725/files/gatomugegamasifegozasis.pdf
    • https://static.usrfiles.com/ugd/2f7815_d0a26ea5ea8a4ec980003f771d8717cc.pdf
    • https://cdn.shopify.com/s/files/1/0437/4695/1319/files/adding_a_gif_to.pdf
    • https://cdn.shopify.com/s/files/1/0432/4740/3168/files/92539672364.pdf
    • https://static.usrfiles.com/ugd/45e30f_3bcd70597260423cb9f4c900fba144be.pdf
    • https://static.usrfiles.com/ugd/4dd980_7f403fff56b44d4bbdaa82d246c05492.pdf
    • https://static.usrfiles.com/ugd/3aee12_b20e415ee5a143cab510f7eb1ee9b04d.pdf
    • https://static.usrfiles.com/ugd/1d5a3f_af97895ffe81497ba8b1b1469d101ccd.pdf
    • https://static.usrfiles.com/ugd/b8c837_0d1145e8a3264e6b93c0dce3e7f1780e.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_off00006a6e.bin
1250b8e623d41e1cabb9d3f2a379a6de138fdb3eb677f03acb2b5aa165e5edd2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A6E 5396 bytes
font_01_sfnt_off00007c94.bin
767f461d0ec19ff70717620f562e8ba4b1c09fc9e8a9b22a2d060204cbc27c9d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C94 9328 bytes
font_02_sfnt_off00009c79.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x9C79 4324 bytes