Malicious PDF — malware analysis report

Static analysis result for SHA-256 987185d980b3469b…

MALICIOUS

PDF

37.6 KB Created: 2020-08-06 12:05:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3b767c958e7eaf5dd77bdc941927b58 SHA-1: f5f613cee73849cd4476c5b68523dc2f7fb82e95 SHA-256: 987185d980b3469b0e5bd919dd244384dd5ce3a3a874a63533cbcccbde183aee
150 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though partially corrupted, contains the URL 'https://ttraff.cc/pify?keyword=patogenesis+anemia+defisiensi+besi+pdf', which is flagged as a malicious redirector. The presence of numerous other PDF links, as indicated by 'PDF_SEO_LINK_FARM', further supports a malicious intent to drive traffic to potentially harmful sites.

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=patogenesis+anemia+defisiensi+besi+pdf
    • http://files.queensdiner803.com/uploads/1/3/1/0/131070938/5769681.pdf
    • http://files.genjipedia.com/uploads/1/3/0/8/130814177/9722808.pdf
    • http://files.gaindetalks.com/uploads/1/3/0/8/130874629/dojoja-kefuzegomoli-wadab.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21659337375.pdf
    • https://cdn.shopify.com/s/files/1/0433/0101/1614/files/41015563248.pdf
    • https://cdn.shopify.com/s/files/1/0429/3437/0470/files/15217054300.pdf
    • https://cdn.shopify.com/s/files/1/0431/1023/6321/files/nizodesumukofa.pdf
    • https://cdn.shopify.com/s/files/1/0431/2160/6818/files/bamudebirikuziwix.pdf
    • https://cdn.shopify.com/s/files/1/0432/8266/1526/files/archinteriors_vol_52.pdf
    • https://cdn.shopify.com/s/files/1/0437/9050/0001/files/is_11111_a_valid_zip_code.pdf
    • https://cdn.shopify.com/s/files/1/0440/7069/9160/files/jifuxiwosozidedujigul.pdf
    • https://cdn.shopify.com/s/files/1/0432/2977/3982/files/41460062310.pdf
    • https://cdn.shopify.com/s/files/1/0431/4444/6118/files/98606045760.pdf
    • https://cdn.shopify.com/s/files/1/0430/9755/5108/files/26132929588.pdf
    • https://cdn.shopify.com/s/files/1/0438/3319/6706/files/2020_gujarati_calendar_free_download.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_off0000560b.bin
24861d743d286fa655c93f3e62b192e5c8b7aefdc0848663f660e620a7d357ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x560B 5376 bytes
font_01_sfnt_off00006843.bin
351df3de562665f41bde74cc25779e0e4cfab3bd72d54fdfedc57f9b9bd8cec5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6843 9744 bytes

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