Malicious PDF — malware analysis report

Static analysis result for SHA-256 59a46a9eace483ad…

MALICIOUS

PDF

34.9 KB Created: 2020-08-19 13:18:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19d896dea6cac4ea41b4272aa0e3cd9d SHA-1: 6348e252855c44762e0376f90596afd4ae8f0a50 SHA-256: 59a46a9eace483adade88982db66ecfdb1af4694e64acd132047341a9f109873
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged as malicious by an ML classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=buddha+images+hd+wallpaper', which is likely the primary malicious payload delivery mechanism. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources, including 'https://cdn.shopify.com/s/files/1/0439/7904/7070/files/zagixun.pdf'.

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.com/pify?keyword=buddha+images+hd+wallpaper
    • http://files.slatingtonbaptist.org/uploads/1/3/0/7/130775441/257e238ee.pdf
    • http://files.ericbrittmusic.com/uploads/1/3/0/7/130776601/310a8a.pdf
    • http://weris.mrsmichelebrown.com/uploads/1/3/1/4/131454549/fc768ab7a21b3e.pdf
    • http://files.franklinpres.org/uploads/1/3/0/8/130813458/4a72fe.pdf
    • https://cdn.shopify.com/s/files/1/0439/7904/7070/files/zagixun.pdf
    • https://cdn.shopify.com/s/files/1/0437/0569/6407/files/50391368702.pdf
    • https://cdn.shopify.com/s/files/1/0432/9085/3540/files/79751924380.pdf
    • https://cdn.shopify.com/s/files/1/0440/3573/5717/files/zukobub.pdf
    • https://cdn.shopify.com/s/files/1/0433/5976/4634/files/rutugoluxofadijawiw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48466687054.pdf
    • https://cdn.shopify.com/s/files/1/0430/6078/9409/files/buziwowibijobok.pdf
    • https://cdn.shopify.com/s/files/1/0433/9807/0426/files/can_t_hurt_me_david_goggins_reddit.pdf
    • https://cdn.shopify.com/s/files/1/0429/2883/2675/files/dikoxetudeput.pdf
    • https://cdn.shopify.com/s/files/1/0431/2052/5469/files/pafonupowesijixezavu.pdf
    • https://cdn.shopify.com/s/files/1/0437/3191/0821/files/35129142549.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rerotapok.pdf
    • https://cdn.shopify.com/s/files/1/0439/5221/0088/files/fajugilosefodaxebiniji.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000042b3.bin
41c98186d1052d5a7309cd254e9d8d5a7f8d2f4fd1fbdb21b9938bc28cba09dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x42B3 5100 bytes
font_01_sfnt_off00005411.bin
8d98f16a81cf9110f31e786e4b67b84407854551189f948e279cbe7a376bb9ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5411 8324 bytes
font_02_sfnt_off00007077.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7077 4324 bytes

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