Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8549323e1d98574…

MALICIOUS

PDF

42.0 KB Created: 2020-08-07 17:15:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6ef6f4d2b668dc76cf05116d5d29507 SHA-1: c94d5ab977eb67d8bcd23a0ff0578a04125b8928 SHA-256: e8549323e1d98574c5a1ba4a9b24130f9a1b7d5d1103a8c87d930add4ca927ba
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with the primary link directing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL https://ttraff.cc/pify?keyword=cours+anglais+francais+traduction+pdf, which is the initial lure. This suggests the document's purpose is to redirect users to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/pify?keyword=cours+anglais+francais+traduction+pdf
    • http://files.reneubeauty.com/uploads/1/3/1/6/131636927/tebuvarutu.pdf
    • http://files.lifebeginsafter50.shop/uploads/1/3/1/6/131606065/acde29f2.pdf
    • http://files.wicksitslit.com/uploads/1/3/0/7/130739802/3635628.pdf
    • http://files.nanotools.us/uploads/1/3/0/8/130873838/c8a1f526c.pdf
    • http://files.atthehelmbluffton.com/uploads/1/3/1/0/131070992/5313430.pdf
    • https://cdn.shopify.com/s/files/1/0437/0300/9430/files/fejeru.pdf
    • https://cdn.shopify.com/s/files/1/0441/0087/8488/files/nupisukeg.pdf
    • https://cdn.shopify.com/s/files/1/0434/6406/5188/files/16915133030.pdf
    • https://cdn.shopify.com/s/files/1/0432/4874/6651/files/53351798811.pdf
    • https://cdn.shopify.com/s/files/1/0429/5265/5002/files/laboz.pdf
    • https://cdn.shopify.com/s/files/1/0433/5144/1562/files/70132230602.pdf
    • https://cdn.shopify.com/s/files/1/0432/6427/8686/files/star_wars_ahsoka_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/8264/5665/files/55138533886.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6657/files/xeduvatox.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gofifarigomikidapowokov.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/97503793953.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000624a.bin
4a97a687bdf2c9ff7d82f02280a379e3a4741383997139f66090bb2b2d18f714		 pdf-font-stream PDF embedded font (sfnt) at offset 0x624A 5228 bytes
font_01_sfnt_off00007423.bin
90d6a21cb22799cf71f891f3aadd44f433b64c95c76b299960932c85ba8a40f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7423 11564 bytes

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