Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f6007e38666ff53…

MALICIOUS

PDF

45.1 KB Created: 2020-07-30 23:24:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97fe4f290093a45f9f7a5e1d4e25db68 SHA-1: 1e44af702217d72f42e1bcd1acf6b24fd98a3c5d SHA-256: 4f6007e38666ff537be29325cc88a3ae4bf3366b8ebebe89d339fd4189411446
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 of which point to a link farm hosted on cdn.shopify.com, and one critical link to a known malicious redirector at ttraff.ru. The document body, though heavily obfuscated, suggests a lure related to 'Jeppesen aviation weather pdf'. The ML classifier also 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.ru/pify?keyword=jeppesen+aviation+weather+pdf
    • http://files.tracyspadafora.com/uploads/1/3/2/8/132815828/c11f4c.pdf
    • http://files.bertsheffieldparaequestrianrider.com/uploads/1/3/0/8/130873781/pegonadotitinup_konoxi_xusim.pdf
    • http://files.sampsongigharbortherapy.com/uploads/1/3/1/6/131637257/9f3a166e32297aa.pdf
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/xepufilumoruzo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78046530146.pdf
    • https://cdn.shopify.com/s/files/1/0432/5939/6254/files/muxobuvituxafupukis.pdf
    • https://cdn.shopify.com/s/files/1/0432/0601/7186/files/kapawejekilewineze.pdf
    • https://cdn.shopify.com/s/files/1/0434/6419/6256/files/77516940047.pdf
    • https://cdn.shopify.com/s/files/1/0435/3415/5928/files/77365019910.pdf
    • https://cdn.shopify.com/s/files/1/0430/8946/1410/files/puwalopozaveditowasiwuwe.pdf
    • https://cdn.shopify.com/s/files/1/0438/6642/3456/files/tizerupugatuxexupogu.pdf
    • https://cdn.shopify.com/s/files/1/0437/4170/8453/files/jedefudasisigujemipuzamot.pdf
    • https://cdn.shopify.com/s/files/1/0432/1991/0820/files/75390847041.pdf
    • https://cdn.shopify.com/s/files/1/0432/5654/5433/files/81902679179.pdf
    • https://cdn.shopify.com/s/files/1/0437/1765/6728/files/68241819498.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/
    • https://cdn.shopify.com/s/file

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000072fd.bin
275b602f3596e10179e90dbd33a6a25322572f6d3409b84a3fe5731a6f530afd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72FD 5024 bytes
font_01_sfnt_off00008414.bin
cf76a5bdc74c31d653bfa9d05875b4f330e206cdf70f3a6def031cc7fef0335a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8414 10428 bytes

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