Malicious PDF — malware analysis report

Static analysis result for SHA-256 49f1c2b65aa1b83f…

MALICIOUS

PDF

35.0 KB Created: 2020-08-02 06:45:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a34a434e037427407654161526cadc25 SHA-1: 99183f9fa3229777b9e616a6370977aafe7b09a8 SHA-256: 49f1c2b65aa1b83f3c99824be8fb08baee5d451708747d5dfbbe578f4ba36af0
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 pointing to Shopify domains, but one critical link directs to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text referencing a 'Baofeng bf f8hp manual' and the malicious URL, suggesting a lure to trick users into visiting the redirector. The ML classifier also strongly flagged this PDF as malicious.

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.com/pify?keyword=baofeng+bf+f8hp+manual
    • http://files.victoriajsmith.com/uploads/1/3/1/6/131606016/woduxe_rugadujeg_zabugujariroka.pdf
    • http://files.425sqn.org/uploads/1/3/0/8/130814642/zotazaboma.pdf
    • http://files.masteractorsbayarea.com/uploads/1/3/1/4/131406717/31338c188ce9957.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37144816260.pdf
    • https://cdn.shopify.com/s/files/1/0431/7777/1164/files/27417738465.pdf
    • https://cdn.shopify.com/s/files/1/0427/6345/2583/files/luwapave.pdf
    • https://cdn.shopify.com/s/files/1/0432/9222/9797/files/15401094642.pdf
    • https://cdn.shopify.com/s/files/1/0428/6650/7942/files/pegipepinomejibo.pdf
    • https://cdn.shopify.com/s/files/1/0438/2287/4781/files/77481300127.pdf
    • https://cdn.shopify.com/s/files/1/0433/1392/2206/files/11648827025.pdf
    • https://cdn.shopify.com/s/files/1/0429/4803/4716/files/19877158137.pdf
    • https://cdn.shopify.com/s/files/1/0431/4071/0566/files/96896849126.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71062637782.pdf
    • https://cdn.shopify.com/s/files/1/0433/9574/3907/files/furewenutolaregojizu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3729/3724/files/minefesowotidikifadavera.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_off0000491e.bin
9c617b58b34c48c210759634bfed77527e7534899bfff43bc0644dfa059fdac9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x491E 5424 bytes
font_01_sfnt_off00005b76.bin
dd582b9fbfd5127afdc1a429adc2d5f12e3a4d48b48e8d476f2e6e0fdf524431		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B76 10864 bytes

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