Malicious PDF — malware analysis report

Static analysis result for SHA-256 36cd2e433264c280…

MALICIOUS

PDF

39.5 KB Created: 2020-08-16 23:20:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 857cedf0747f67328deded1a3be38d86 SHA-1: 5e9b71f7c6f0e4c2384514c9b76f82cf6632af37 SHA-256: 36cd2e433264c2803ed4fe12a568265498c621a4ff18ddcae5067d151cbe31cf
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.ru'. This suggests a link farm SEO attack designed to drive traffic to malicious infrastructure. The document body contains garbled text but also includes the malicious URL and several benign-looking PDF links, reinforcing the lure. No scripts were extracted from this sample.

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=beauty+parlour+logos+free
    • http://files.imaginesullivant.org/uploads/1/3/2/7/132710795/mikuwub.pdf
    • http://files.crtcbooster.com/uploads/1/3/1/3/131381677/talowojakeg.pdf
    • http://files.jaidephotography.com/uploads/1/3/1/3/131398076/2260887.pdf
    • http://kusisoreb.thebedfordledger.com/uploads/1/3/1/4/131438137/2121456.pdf
    • https://cdn.shopify.com/s/files/1/0439/8094/7614/files/62410975968.pdf
    • https://cdn.shopify.com/s/files/1/0432/7427/2924/files/62824308568.pdf
    • https://cdn.shopify.com/s/files/1/0435/4169/2580/files/lesamaxefopemokofitosu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9019/8180/files/property_damage_release_form.pdf
    • https://cdn.shopify.com/s/files/1/0431/8691/3437/files/44332389223.pdf
    • https://cdn.shopify.com/s/files/1/0438/9643/8936/files/bizaseviveruxowepu.pdf
    • https://cdn.shopify.com/s/files/1/0437/7201/8845/files/mo_murda_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0432/1109/6221/files/72034944975.pdf
    • https://cdn.shopify.com/s/files/1/0435/3648/2458/files/lokagevefukudo.pdf
    • https://cdn.shopify.com/s/files/1/0437/2620/9175/files/barron_s_sat_vocabulary.pdf
    • https://cdn.shopify.com/s/files/1/0427/6014/3014/files/kopawemufu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vevisip.pdf
    • https://cdn.shopify.com/s/files/1/0432/4048/9122/files/76754545528.pdf
    • https://cdn.shopify.com/s/files/1/0432/2135/2606/files/fodif.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_off00005f16.bin
8ade22aecbfd1b66eeb4a4d1b91b700eda94ac5d86a88d42c66c769c0ce485bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F16 5220 bytes
font_01_sfnt_off000070f5.bin
3d922422974c07335a9a1ed7a194d3bd65de3733ab4ce92b3914f2d46447043d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70F5 9516 bytes

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