Malicious PDF — malware analysis report

Static analysis result for SHA-256 b96a0e5b93100711…

MALICIOUS

PDF

44.5 KB Created: 2020-08-02 00:48:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: abd1b2ccb76b867f46aaa4c8586b8d1f SHA-1: a67de7c21e8d5e7c34213c17da0593b6ab10b237 SHA-256: b96a0e5b93100711ed0d8648e6f2f203a8bde71a435c729df57cd59417da36a7
150 Risk Score

Malware Insights

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

The PDF document was flagged as malicious by a machine learning classifier and contains a large number of embedded links. One critical heuristic indicates that these links point to a known malicious redirector infrastructure, specifically 'ttraff.com', which is used to obscure the final destination. The document body, though heavily obfuscated, contains text related to a 'Kgro power pro lawn mower manual', suggesting a lure to entice users to click the malicious links. The presence of numerous external PDF links further supports the classification as a link farm, likely for SEO manipulation or to distribute further malicious content.

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=kgro+power+pro+lawn+mower+manual
    • http://files.casciabooks.com/uploads/1/3/2/8/132816066/wuzekewapubamaweb.pdf
    • http://files.livingatthedistillery.com/uploads/1/3/0/7/130776591/dilunokewanubol-duvafopap-pijikofusejoji.pdf
    • http://files.singersandactorsworkshop.com/uploads/1/3/2/7/132740218/mubazaxumadajag.pdf
    • http://files.mountainapotheca.com/uploads/1/3/2/7/132710748/53bf68b68e.pdf
    • https://cdn.shopify.com/s/files/1/0431/2272/0922/files/kurogovokefegibovi.pdf
    • https://cdn.shopify.com/s/files/1/0438/8657/5771/files/vewik.pdf
    • https://cdn.shopify.com/s/files/1/0432/6644/1376/files/43934766683.pdf
    • https://cdn.shopify.com/s/files/1/0434/1448/7190/files/68649716550.pdf
    • https://cdn.shopify.com/s/files/1/0430/1701/1353/files/69433921109.pdf
    • https://cdn.shopify.com/s/files/1/0431/6862/8892/files/87084785108.pdf
    • https://cdn.shopify.com/s/files/1/0429/8909/3018/files/mowukavurakaj.pdf
    • https://cdn.shopify.com/s/files/1/0428/8118/8003/files/xamopokaxoxexogipuki.pdf
    • https://cdn.shopify.com/s/files/1/0429/7634/6266/files/77998386915.pdf
    • https://cdn.shopify.com/s/files/1/0435/1311/8872/files/r_density_plot.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vuwotowomezi.pdf
    • https://cdn.shopify.com/s/files/1/0429/1143/2857/files/51908062409.pdf
    • https://cdn.shopify.com/s/files/1/0432/4818/9603/files/xijatufitowimun.pdf
    • https://cdn.shopify.com/s/files/1/0427/9199/3500/files/41315520217.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_off00007116.bin
7f4b6cfe3b72183fc087424e31dcdca6d0e6745f70f3cb399738cdabc5bcb390
pdf-font-stream PDF embedded font (sfnt) at offset 0x7116 5020 bytes
font_01_sfnt_off00008235.bin
dfa0501cce6ffa1095eeebb7012f4c022e6f79a9d0bcba08d84da01fd8ccd677
pdf-font-stream PDF embedded font (sfnt) at offset 0x8235 10112 bytes