Malicious PDF — malware analysis report

Static analysis result for SHA-256 efaa27635ef914df…

MALICIOUS

PDF

45.0 KB Created: 2020-07-31 20:21:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 47c2f3523200937d7d66f79937c91cdc SHA-1: 1dffce4645b89ec5c787d19c4bfd677252b4d14c SHA-256: efaa27635ef914df504a6153e77b539cee0326c831f864f349a01f3d3a01e77b
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure related to a thermodynamics PDF, and includes the malicious URL. The presence of numerous Shopify links suggests an attempt to blend malicious content with benign-looking file hosting.

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=classical+and+statistical+thermodynamics+carter+pdf
    • http://files.180degrees.org/uploads/1/3/2/3/132302732/matajelozotafetiruwa.pdf
    • http://files.ginamagnoliaart.com/uploads/1/3/1/4/131454459/4823787.pdf
    • http://files.hamptonplaceclt.com/uploads/1/3/1/3/131380845/zewafogukepa.pdf
    • https://cdn.shopify.com/s/files/1/0436/2836/3939/files/wijopamatizopefiv.pdf
    • https://cdn.shopify.com/s/files/1/0440/9743/7848/files/75171588967.pdf
    • https://cdn.shopify.com/s/files/1/0437/7234/6526/files/ladija.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zugazad.pdf
    • https://cdn.shopify.com/s/files/1/0434/5276/0224/files/motuliwupufogadesujo.pdf
    • https://cdn.shopify.com/s/files/1/0429/4252/9695/files/44562527371.pdf
    • https://cdn.shopify.com/s/files/1/0436/9262/1978/files/mosof.pdf
    • https://cdn.shopify.com/s/files/1/0437/2607/8106/files/5791364836.pdf
    • https://cdn.shopify.com/s/files/1/0433/6720/2974/files/gejabepixikafikoloriga.pdf
    • https://cdn.shopify.com/s/files/1/0435/2763/5096/files/bigigotoxopepavener.pdf
    • https://cdn.shopify.com/s/files/1/0431/5804/4826/files/zuzazufefikizivuvul.pdf
    • https://cdn.shopify.com/s/files/1/0432/4183/2615/files/belagimu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2479/3245/files/84265923201.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_off00007082.bin
907c0b243e9737f4eeffaff4efca0fb616ad6e98e43aa2660c9f9af320c438ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7082 5404 bytes
font_01_sfnt_off000082b6.bin
ac1d3867fe93dfd7db7ad24a58756f202751becaa4dc814a083f38b045196ffb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82B6 10520 bytes

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