Malicious PDF — malware analysis report

Static analysis result for SHA-256 d572022e93f3ee06…

MALICIOUS

PDF

59.6 KB Created: 2020-08-04 09:24:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b582ab177829decf88576af7207fa05a SHA-1: 909651de1be80cf10077780a361dcce4e3a48281 SHA-256: d572022e93f3ee0626389b106baf4a9a3862072aed37d39651c9c6a6e9e9b9f9
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'https://ttraff.cc/pify?keyword=introduction+to+affine+geometry+pdf'. The document body, though partially corrupted, also contains this URL, suggesting a lure to a malicious site disguised as academic content. The ML classifier strongly supports the malicious nature of this PDF.

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=introduction+to+affine+geometry+pdf
    • http://jipij.kingdomtransformationchurch.org/uploads/1/3/2/6/132681504/jefejo.pdf
    • http://files.firsttakeagency.com/uploads/1/3/2/6/132681033/ramokonosakel.pdf
    • http://files.hornsbyptsa.org/uploads/1/3/1/3/131379434/bomujakurufilo.pdf
    • http://files.busylilbeefloral.com/uploads/1/3/2/6/132696029/8207767.pdf
    • http://files.mydbsservices.com/uploads/1/3/1/4/131406544/debutibedobi.pdf
    • https://cdn.shopify.com/s/files/1/0438/3762/0386/files/kubatab.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71409998288.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/5903401900.pdf
    • https://cdn.shopify.com/s/files/1/0432/9163/9974/files/xamitakotoninog.pdf
    • https://cdn.shopify.com/s/files/1/0436/9920/8346/files/37872859827.pdf
    • https://cdn.shopify.com/s/files/1/0435/2252/3288/files/xoxonazujarujorasute.pdf
    • https://cdn.shopify.com/s/files/1/0430/6970/2306/files/mezetoxapotawu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5099/0753/files/losulozezeluse.pdf
    • https://cdn.shopify.com/s/files/1/0428/8249/8716/files/86479228233.pdf
    • https://cdn.shopify.com/s/files/1/0430/4686/3005/files/79697536156.pdf
    • https://cdn.shopify.com/s/files/1/0433/7762/3194/files/nepefozodogigofos.pdf
    • https://cdn.shopify.com/s/files/1/0437/7896/5656/files/wudoxu.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007b59.bin
2d10c82ef08d58932f057ad62c7d79a4ace541c0b503930639bbfdbc9a8a3857		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B59 5188 bytes
font_01_sfnt_off00008ceb.bin
cddb2a78d7ecd6e889775699244dbf1fbae1af226aea6df5807bc4148f442baf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CEB 15648 bytes
font_02_sfnt_off0000bd87.bin
9de08dc905cbd07b8886690058a81895e05784516d7839d928fa552090f9aba6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBD87 16196 bytes
font_03_sfnt_off0000d2d1.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD2D1 4324 bytes

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