Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fda9c053dffae11…

MALICIOUS

PDF

68.4 KB Created: 2020-07-10 21:15:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c417b4d2579c6dab493b85f0b2e8c39 SHA-1: 1bf17b68269602b8e955c66f035ba74b41650f03 SHA-256: 4fda9c053dffae11063d4a90c6e99f560b7745c5ddee5473e77225b4f3ec629e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic firing for a redirector link to 'ttraff.cc' and another for a PDF link farm. The document body, though heavily obfuscated, contains text related to 'Lamborghini aventador specs pdf' and the URL 'https://ttraff.cc/wb?keyword=lamborghini%20aventador%20specs%20pdf', suggesting a lure to a malicious site. The ML classifier also strongly flagged this PDF as malicious.

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/wb?keyword=lamborghini%20aventador%20specs%20pdf
    • http://files.woodlandsfrenchies.com/uploads/1/3/1/3/131383553/buvomagedax_dopiriveluk.pdf
    • http://files.gcollaborative.com/uploads/1/3/2/6/132695493/00b74c81dca60.pdf
    • http://files.timcycyota.com/uploads/1/3/1/8/131871994/8578123.pdf
    • http://files.amandaraebeauty.com/uploads/1/3/0/7/130738806/5a7071a03.pdf
    • http://files.archanasuresh.com/uploads/1/3/1/6/131636772/3714411.pdf
    • http://files.palmcoastbaptistchurch.com/uploads/1/3/1/4/131483154/dovefa.pdf
    • http://files.sweetruthies.com/uploads/1/3/0/8/130873798/nomurifukut.pdf
    • http://files.sweetbabiesdayhome.com/uploads/1/3/2/7/132740320/zipud_wenuv_soraminudej.pdf
    • http://files.projectq.co.uk/uploads/1/3/1/6/131606231/wurazono.pdf
    • http://files.lightningridgerealestate.com.au/uploads/1/3/2/8/132815961/tuwor.pdf
    • http://files.katedacy.com/uploads/1/3/2/3/132303317/vinanazinojamexa.pdf
    • http://files.aquestforhealthandpeace.com/uploads/1/3/1/4/131452794/26cd6b0.pdf
    • https://rabedebeg.files.wordpress.com/2020/06/95233252394.pdf
    • https://sijujorekij.files.wordpress.com/2020/07/kupusatugidetedirofotadud.pdf
    • https://xaxuxite.files.wordpress.com/2020/07/rixapasopadigej.pdf
    • https://xevesir.files.wordpress.com/2020/07/pafixozitalirelusuvujugol.pdf
    • https://kavuwuri.files.wordpress.com/2020/06/bifinobatupewomuviwubi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zijuk.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8864/files/rusujamipewevimevimufij.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98223768302.pdf
    • https://cdn.shopify.com/s/files/1/0430/5174/5442/files/vidaguge.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_off0000b765.bin
e21fe10c13213696589b283c6f2847dcddee5c530d15baf4c2bfe66d0d55b9d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB765 5468 bytes
font_01_sfnt_off0000c9d8.bin
e9f0c7a96a96e4097afcc16603a19b020eeeb183deea1f7f32ec7162e894fb4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC9D8 10936 bytes
font_02_sfnt_off0000ef58.bin
52db30b66cfb76898988bc7c6ed152514c301740808ab95bec9c68e49df23550		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF58 16036 bytes

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