Malicious PDF — malware analysis report

Static analysis result for SHA-256 928e99827670cf41…

MALICIOUS

PDF

43.3 KB Created: 2020-08-25 00:42:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b47d81a2da466bc2e6499416ee6cb87e SHA-1: 60b1478886d089dda2d6dc753cc5f4998da0e259 SHA-256: 928e99827670cf41c13972589db13243c0aded23c903f1721e3c9960ea7b8dc6
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as "World health organization sugar guidelines". This link points to ttraff.com, a known malicious redirector. The document also contains a large number of external PDF links, many hosted on cdn.shopify.com, suggesting a link farm or SEO poisoning attempt. The ML classifier strongly indicated maliciousness.

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=world+health+organization+sugar+guidelines
    • http://files.meganfmccormick.com/uploads/1/3/0/7/130775668/dazikenul-muviziti-nideg-xedugusevuji.pdf
    • http://fegew.erinvalleyridingstables.com/uploads/1/3/1/1/131164243/2411152.pdf
    • http://files.lightthewaytraining.com/uploads/1/3/0/8/130813524/diridodufim-kesanubovazabo-xozum-wilodikamelen.pdf
    • http://jejigedam.lavenderbluevintagedesigns.com/uploads/1/3/2/8/132814718/zifejogibujizuzozu.pdf
    • https://cdn.shopify.com/s/files/1/0440/3740/6870/files/zuzowosow.pdf
    • https://cdn.shopify.com/s/files/1/0434/8697/0018/files/valores_humanos_inframorales.pdf
    • https://cdn.shopify.com/s/files/1/0430/3909/6986/files/1137557742.pdf
    • https://cdn.shopify.com/s/files/1/0432/5117/1478/files/57507303649.pdf
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/get_element_by_id_in_view_port.pdf
    • https://cdn.shopify.com/s/files/1/0437/6517/0334/files/jofufog.pdf
    • https://cdn.shopify.com/s/files/1/0435/5466/8705/files/bielsko_biaa_plan_miasta.pdf
    • https://cdn.shopify.com/s/files/1/0431/7272/4900/files/72644434475.pdf
    • https://cdn.shopify.com/s/files/1/0431/5942/1092/files/30557004118.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fuxojusi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6925/1487/files/60044124154.pdf
    • https://cdn.shopify.com/s/files/1/0428/3301/9047/files/jirijumamunazademupe.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_off00006aa9.bin
1af6da3a6dffd70a8959d075583b988fcb1ab54f6de7755c4f83fad3309b135a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AA9 5152 bytes
font_01_sfnt_off00007c40.bin
c1520d9fd8b375048a4012a6fa2b69bac1074a97b5acf25166cb069fd12a64aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C40 10320 bytes

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