Malicious PDF — malware analysis report

Static analysis result for SHA-256 60fdc8bc95e10ad1…

MALICIOUS

PDF

39.8 KB Created: 2020-08-31 01:06:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8768f854d51cc79e21ea2805dbb117d4 SHA-1: a80ffc604b503bfa32c9e54ca090647d53d6c5c1 SHA-256: 60fdc8bc95e10ad1839aa9999553534e0e437c1210fa8f7036ec09fedc0a2f29
162 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a download for 'Bollywood songs collection zip file'. This link points to 'ttraff.cc', which is flagged as malicious redirector infrastructure. The PDF also hosts a large number of external links, many of which are benign, but the primary malicious link is the most concerning. The ML classifier strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=bollywood+songs+collection+zip+file
    • http://ssurll.com/10uyp9
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/02beb7_a47e72d3b4fa4e90a03aecd98ac6da14.pdf
    • https://static.usrfiles.com/ugd/1a89c8_9aa996d2eb894456a0f563b72366ad9a.pdf
    • https://static.usrfiles.com/ugd/b8c837_62a5d968ecc846639d3de5cc1a6faf2a.pdf
    • https://static.usrfiles.com/ugd/b8c837_f4bf6b409ea74fed8cf0887e40321912.pdf
    • https://cdn.shopify.com/s/files/1/0428/4914/0902/files/28532470970.pdf
    • https://cdn.shopify.com/s/files/1/0430/9581/8404/files/ahead_by_a_century_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rabilividobakomitunaxizug.pdf
    • https://cdn.shopify.com/s/files/1/0448/0348/9954/files/beowulf_analysis_and_summary.pdf
    • https://cdn.shopify.com/s/files/1/0449/6785/4248/files/59764764796.pdf
    • https://static.usrfiles.com/ugd/65b209_13559e1586214221a041b1cd2db58f5a.pdf
    • https://static.usrfiles.com/ugd/4dd980_7e82a4ed70cd490f9c94ebe1bcedf376.pdf
    • https://static.usrfiles.com/ugd/739437_59a1c2e6fa4643d39560dddc8a48d05b.pdf
    • https://static.usrfiles.com/ugd/451461_faf61188741f47a3a0add8ffa8fd9c68.pdf
    • https://static.usrfiles.com/ugd/b8c837_ce9fe9742dad456c8961b1dc3fe4173d.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_off00005de2.bin
d1af2b8665ae731a03b1e1a51e279dab2c458fc7d0c7425b2fefa3a5e27501bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DE2 5312 bytes
font_01_sfnt_off00007033.bin
3ca0edda062d3bda3b76a718cae503dd5ddcc33660fac1db1f40adbcd2001538		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7033 10120 bytes

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