Malicious PDF — malware analysis report

Static analysis result for SHA-256 98dcd8dda712d04d…

MALICIOUS

PDF

67.4 KB Created: 2020-08-28 12:43:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc59ea3261b3806493f98f97a55f300d SHA-1: bbfede75949b6db9e47aff62260fa5ee944c9134 SHA-256: 98dcd8dda712d04d5df9e595f6770191ae3b7dc099000c07468e535566a76ba3
150 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=limitations+of+cardinal+utility+theory+pdf', which is likely intended to lead the user to a malicious site. The presence of a link farm heuristic further suggests an attempt to manipulate search engine results or distribute malicious links.

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=limitations+of+cardinal+utility+theory+pdf
    • http://files.foundersparkhighlands.org/uploads/1/3/0/8/130814874/gogoleripifewus-goratadalaf.pdf
    • http://files.beaverpastoralcharge.com/uploads/1/3/0/7/130776728/7534487.pdf
    • http://xaxenak.fifthelementdefense.com/uploads/1/3/2/7/132712615/66633.pdf
    • https://cdn.shopify.com/s/files/1/0436/9979/8166/files/jaani_dushman_movie_3gp.pdf
    • https://cdn.shopify.com/s/files/1/0460/7141/4948/files/loriket.pdf
    • https://cdn.shopify.com/s/files/1/0431/7213/5074/files/histology_and_cell_biology_an_introduction_to_pathology_kierszenbaum.pdf
    • https://cdn.shopify.com/s/files/1/0432/8561/0654/files/animal_reproduction_worksheets_for_grade_5.pdf
    • https://cdn.shopify.com/s/files/1/0431/3235/4727/files/ridulugasukoxupegupen.pdf
    • https://cdn.shopify.com/s/files/1/0462/4174/2997/files/wodafoluz.pdf
    • https://cdn.shopify.com/s/files/1/0439/2216/1832/files/86656062301.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/welilavuruwad.pdf
    • https://cdn.shopify.com/s/files/1/0428/6224/8102/files/45631881917.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_off0000b4ae.bin
edc875bc8122da9895e7a1d6e4dd52f070c495742e3bf1e4bff663bc1700acde		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB4AE 5436 bytes
font_01_sfnt_off0000c6ff.bin
11eb2cef03553e6d6dac483d8760b17517e38faa6fb0fec3e42eb8ddd8b182e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC6FF 10496 bytes
font_02_sfnt_off0000eb1b.bin
9798eae3882c6dd0fb2b74aded3910b182eab56c68edbfe7a299e28646c1144b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB1B 16172 bytes

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