Malicious PDF — malware analysis report

Static analysis result for SHA-256 0551210ff19cf204…

MALICIOUS

PDF

50.1 KB Created: 2020-08-30 13:15:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a14697dcb30878574499d5726e6c0ecc SHA-1: 9963b259c11c79f07bf10cdffc70fb499fe62030 SHA-256: 0551210ff19cf204c9e42679b93d442a72ac65c8993d2cafd4acafc8c6c220da
154 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, with a critical heuristic firing indicating it's a malicious redirector. The primary URL, https://ttraff.ru/wix?keyword=songslover.pk+similar+websites, is flagged as malicious. The document body, though heavily obfuscated, contains references to this URL and other PDF links, suggesting an attempt to drive traffic to malicious or spam-related content. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence point to a 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.ru/wix?keyword=songslover.pk+similar+websites
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_3e24c6fa2c754dc99b2900516f28e6c8.pdf
    • https://static.usrfiles.com/ugd/b8c837_674781065962444f941d623837850560.pdf
    • https://static.usrfiles.com/ugd/7598fa_85d04cbeac3a44ce9870f118def337f3.pdf
    • https://static.usrfiles.com/ugd/739437_713edb8e5bd14810beaf786855a202b3.pdf
    • https://static.usrfiles.com/ugd/158fb9_c046a4a8b7f746ec902af5e0049cbee4.pdf
    • https://static.usrfiles.com/ugd/b8c837_7c626649102a4549a26980a6f02a05ce.pdf
    • https://static.usrfiles.com/ugd/b8c837_9af0223be4134b44aeaca6abddd61bdf.pdf
    • https://static.usrfiles.com/ugd/2e4eb4_c840f7d3f835482682ad68b95317288d.pdf
    • https://static.usrfiles.com/ugd/b8c837_ac9ceaa05ab84ae288e72d61d4a35605.pdf
    • https://static.usrfiles.com/ugd/a48928_04bfd98819fb467b93b134c8ebbfb6d3.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/45560821546.pdf
    • https://cdn.shopify.com/s/files/1/0435/8298/0259/files/nevajera.pdf
    • https://cdn.shopify.com/s/files/1/0429/9869/4042/files/91827481430.pdf
    • https://cdn.shopify.com/s/files/1/0436/9124/5733/files/16687134743.pdf
    • https://cdn.shopify.com/s/files/1/0432/9163/9968/files/euphoria_piano_sheet.pdf
    • https://static.usrfiles.com/ugd/b8c837_00f12b5f256a46199567452546e0d61c.pdf
    • https://static.usrfiles.com/ugd/b50c55_510a5c0ef297471c899c4d1f552a01a2.pdf
    • https://static.usrfiles.com/ugd/b8c837_4256e1a6ffbf4d08a811cea1e5adb1dc.pdf
    • https://static.usrfiles.com/ugd/b8c837_dfe740756e4745bbb9da2d2cc664978e.pdf
    • https://static.usrfiles.com/ugd/b8c837_fa69dcda05904dac861d848e4ad6c543.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_off0000784f.bin
b267a53c0431c269a1496fc1205f4a8d2cce3de157eba13d21995d295d8a39c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x784F 5632 bytes
font_01_sfnt_off00008b79.bin
7abdcdf41345998cdc950df8c3e2bbc8eb859a2e977951f558ef4637e5a11d1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B79 14912 bytes

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