Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfa0e460414ee3e7…

MALICIOUS

PDF

50.5 KB Created: 2020-08-04 18:47:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab3df333f2649f609cb8668e395421db SHA-1: 8318034a3d508cc028239765a674433a80429741 SHA-256: cfa0e460414ee3e7c0877c4f580d44eedffcf27b8419f0a7b79dfc311011b9d0
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that triggers the malicious redirector. This suggests a campaign to drive traffic to malicious infrastructure, potentially for phishing or malware distribution.

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.ru/pify?keyword=bearing+number+identification+pdf
    • http://files.worldpaperink.com/uploads/1/3/0/8/130874300/c968fac4634.pdf
    • http://files.xinsheng.co.uk/uploads/1/3/0/9/130969775/fazanapi.pdf
    • http://files.greenideasdurham.co.uk/uploads/1/3/1/4/131452811/0e40b747.pdf
    • https://cdn.shopify.com/s/files/1/0437/3718/6453/files/63308066920.pdf
    • https://cdn.shopify.com/s/files/1/0429/9928/3861/files/28413678140.pdf
    • https://cdn.shopify.com/s/files/1/0435/8635/5357/files/realistic_water_two_sse.pdf
    • https://cdn.shopify.com/s/files/1/0427/6980/9564/files/85221346314.pdf
    • https://cdn.shopify.com/s/files/1/0434/2664/4125/files/zuzilof.pdf
    • https://cdn.shopify.com/s/files/1/0430/5495/6695/files/56596840942.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84113106953.pdf
    • https://cdn.shopify.com/s/files/1/0429/6795/7660/files/18970210594.pdf
    • https://cdn.shopify.com/s/files/1/0428/4622/4551/files/gefelidibebavoraku.pdf
    • https://cdn.shopify.com/s/files/1/0437/4170/8437/files/lavumofotepa.pdf
    • https://cdn.shopify.com/s/files/1/0431/8344/0030/files/mavejejebu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8940/3810/files/22329115172.pdf
    • https://cdn.shopify.com/s/files/1/0427/8976/5279/files/91536806268.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_off000077d1.bin
dbf145ac476b72311446f19d1044c18d7a7b135add9979a677c1306f511097c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77D1 5336 bytes
font_01_sfnt_off000089d4.bin
f991bac4b27ccbd2a787f8233140344141de74bb1630a191c1397e1089c72f42		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89D4 10716 bytes
font_02_sfnt_off0000ae60.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE60 4324 bytes

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