Malicious PDF — malware analysis report

Static analysis result for SHA-256 587d22e4757cf19b…

MALICIOUS

PDF

39.4 KB Created: 2020-08-18 15:45:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8160bdf8d4d232cfaced23a3f6b4745d SHA-1: 670be8b4ba9853ce49bb8fee35fbb8ea49f07f3c SHA-256: 587d22e4757cf19bf9c7c714358a3fe4a34c5583affe194bd71203fe0071005f
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a malicious redirector. The document body, though heavily obfuscated, contains text related to an 'Aprilaire 600 automatic installation manual' and a URL that appears to be a lure. The primary malicious URL is https://ttraff.ru/pify?keyword=aprilaire+600+automatic+installation+manual, which likely leads to further malicious content. The file also contains a large number of links to Shopify domains, many of which are benign, but one unknown URL was also found.

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=aprilaire+600+automatic+installation+manual
    • http://gisikikom.raincityultimateclub.ca/uploads/1/3/1/6/131637306/cb0123a6203484.pdf
    • https://cdn.shopify.com/s/files/1/0441/0392/5912/files/ir_functional_group_table.pdf
    • https://cdn.shopify.com/s/files/1/0437/8502/7745/files/awesome_movie_wallpapers_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0432/3049/4878/files/tcc_library_database.pdf
    • https://cdn.shopify.com/s/files/1/0434/9765/2376/files/kapuf.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8853/files/29090115322.pdf
    • https://cdn.shopify.com/s/files/1/0433/2129/5006/files/convertir_a_dwg_online.pdf
    • https://cdn.shopify.com/s/files/1/0433/6048/5541/files/nitusokudejarobaf.pdf
    • https://cdn.shopify.com/s/files/1/0430/2897/1681/files/wenapirunojatotajitituze.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_off00005c19.bin
cee838ec189436b696c644375f5be3095d75208dbe1daa3beaef81f1e8e6b969		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C19 5364 bytes
font_01_sfnt_off00006e2d.bin
13fbed6ad93332a7ace59e21c03b3fd098a4a777dfb76169e8ac0416dbebb37a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E2D 10336 bytes

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