Malicious PDF — malware analysis report

Static analysis result for SHA-256 cda5c5b0359c7ef3…

MALICIOUS

PDF

45.0 KB Created: 2020-08-08 11:19:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a68e332e4512e5e4ec1e671c96b0b886 SHA-1: 1943a79ad6f788974e9b05bb0c8e3a91988c98d5 SHA-256: cda5c5b0359c7ef3dcb98263929e39356f6af62eedf5d559dfe88d015d6bd501
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL. This suggests the PDF is designed to redirect users to malicious infrastructure, likely for further exploitation or credential harvesting.

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.ru/pify?keyword=carole+king+where+you+lead+pdf
    • http://files.stocktonjunk.com/uploads/1/3/0/7/130739120/225092892ee6339.pdf
    • http://vulefar.adleywechsler.com/uploads/1/3/1/6/131606490/9da523f89171b.pdf
    • http://files.goliadathleticboosters.com/uploads/1/3/1/4/131454207/7881730980e1b1.pdf
    • http://luvokawaf.fitnessbeyondbelief.com/uploads/1/3/2/6/132680813/c04a4f5ed5f4320.pdf
    • http://files.investelyria.org/uploads/1/3/0/7/130775245/8854452.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nagexonulelaxefirulilona.pdf
    • https://cdn.shopify.com/s/files/1/0431/2452/3169/files/gotepotawapawokapaw.pdf
    • https://cdn.shopify.com/s/files/1/0430/5502/2234/files/dixowezitup.pdf
    • https://cdn.shopify.com/s/files/1/0430/7084/9181/files/nolejimepepesofepepufuzi.pdf
    • https://cdn.shopify.com/s/files/1/0431/1348/0354/files/magovawamorifidenokojow.pdf
    • https://cdn.shopify.com/s/files/1/0433/7877/0076/files/the_red_road_season_3.pdf
    • https://cdn.shopify.com/s/files/1/0429/5757/0207/files/3670278647.pdf
    • https://cdn.shopify.com/s/files/1/0436/9419/4843/files/50202222037.pdf
    • https://cdn.shopify.com/s/files/1/0435/2249/0532/files/ocarina_of_time_iso.pdf
    • https://cdn.shopify.com/s/files/1/0437/2329/2822/files/java_programming_examples_with_explanation.pdf
    • https://cdn.shopify.com/s/files/1/0428/2767/7852/files/nodupadakikagumuzubet.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_off000071db.bin
b1a8ba691d386a2b4c45b23877f93021636edb95cc1e42de8537199850e673ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71DB 5288 bytes
font_01_sfnt_off000083ea.bin
11f57a220af046312692c55dccb4cebd6a4c98c8fa6aac66b82c53667bf998d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83EA 10240 bytes

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