Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e5ffd7b24e00659…

MALICIOUS

PDF

42.3 KB Created: 2020-08-02 20:05:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: efbe00f737e745ad4f5a945905d1a27c SHA-1: 0057686946ac3988e23c254c68fd04863bab412e SHA-256: 8e5ffd7b24e00659930215b8b86d51cbce7a8f94ccb5c31c3cdbc2130389bee8
152 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 redirects to a known malicious infrastructure at 'ttraff.com'. This suggests a link farm or SEO poisoning attack designed to lure users to malicious content. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=the+adventures+of+tom+sawyer+test+pdf
    • http://files.capsulate.life/uploads/1/3/1/4/131482832/sepajetekava.pdf
    • http://files.redroomyoga.com/uploads/1/3/1/4/131483128/vebuwe.pdf
    • http://files.pearlhenryboutique.com/uploads/1/3/1/3/131384635/5343208.pdf
    • http://files.lappiesinoz.com/uploads/1/3/0/7/130776619/fibev-xenanunetuke-kagoja.pdf
    • https://cdn.shopify.com/s/files/1/0433/4452/7511/files/20100451262.pdf
    • https://cdn.shopify.com/s/files/1/0428/9282/0643/files/3790917826.pdf
    • https://cdn.shopify.com/s/files/1/0431/4267/6636/files/18481777960.pdf
    • https://cdn.shopify.com/s/files/1/0429/1097/4108/files/54236371257.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jenodilibaxu.pdf
    • https://cdn.shopify.com/s/files/1/0435/9992/1315/files/89202529396.pdf
    • https://cdn.shopify.com/s/files/1/0429/4171/0499/files/lujuvuzeme.pdf
    • https://cdn.shopify.com/s/files/1/0434/3224/7445/files/tewaxusixij.pdf
    • https://cdn.shopify.com/s/files/1/0437/7241/2055/files/wufav.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/62114329075.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nuruge.pdf
    • https://cdn.shopify.com/s/files/1/0436/7689/3334/files/5346055145.pdf
    • https://cdn.shopify.com/s/files/1/0438/4423/9510/files/43373252067.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000059b9.bin
347c54167fd3b25e59354f9b4819f6751a7fc201df95453671167f0d0e7aacd1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59B9 5284 bytes
font_01_sfnt_off00006b99.bin
3546feb4c1efbe87fe457130b2f46e11c48f0cf3bb96d2c8fe726ad54f3803c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B99 10204 bytes
font_02_sfnt_off00008e3d.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E3D 4324 bytes

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