Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5fd306537adf484…

MALICIOUS

PDF

41.6 KB Created: 2020-08-15 15:40:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa69588e9852c0b430d107ca5d7122fb SHA-1: b43984f8e57b61dd2d84cd9c2ef03013ba74c208 SHA-256: d5fd306537adf4848855edddb1b465c2a77d2fb54f1217c42ba4c5f1c4ffb824
128 Risk Score

Malware Insights

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

The PDF file contains a link farm and a malicious redirector URL, indicating a phishing or scam attempt. The document body, though heavily obfuscated, contains the primary malicious URL and several benign-looking URLs hosted on Shopify, likely to lend legitimacy. The heuristic firings confirm the presence of a malicious redirector and a link farm, suggesting the document's purpose is to drive traffic to malicious infrastructure.

Heuristics 4

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/wb?keyword=binary%20multiplication%20and%20division%20pdf
    • http://files.birdlifeproductions.co.nz/uploads/1/3/0/9/130969818/tupalawewebutanul.pdf
    • http://nopolura.cloverfieldbehaviour.com/uploads/1/3/0/9/130969204/gixogiwufamu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9982/4032/files/60910555685.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71895612735.pdf
    • https://cdn.shopify.com/s/files/1/0427/4143/2487/files/51003046465.pdf
    • https://cdn.shopify.com/s/files/1/0435/8055/5419/files/gidamapatofipakus.pdf
    • https://cdn.shopify.com/s/files/1/0437/1070/9913/files/lakod.pdf
    • https://cdn.shopify.com/s/files/1/0432/0804/8808/files/76252470913.pdf
    • https://cdn.shopify.com/s/files/1/0435/3989/0327/files/6897101412.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/gofepezew.pdf
    • https://cdn.shopify.com/s/files/1/0427/4749/4567/files/levidalujidetiwutoz.pdf
    • https://cdn.shopify.com/s/files/1/0433/5294/8901/files/miluponavurod.pdf
    • https://cdn.shopify.com/s/files/1/0428/5366/2883/files/cursive_writing_passages.pdf
    • https://cdn.shopify.com/s/files/1/0437/7152/7325/files/sibirim.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_off0000622b.bin
4051544ed049f09a5b221e8669c8e4ec40cb42cafded51a7873e54f772330ca3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x622B 5512 bytes
font_01_sfnt_off000074cf.bin
81407e8e86dd3ac893b737e55f7160b703ab507a817adfe06cc82e2ce2ab6136		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74CF 10748 bytes

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