Malicious PDF — malware analysis report

Static analysis result for SHA-256 aca5403739c34b51…

MALICIOUS

PDF

70.3 KB Created: 2020-08-24 06:17:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 88e3ca0cdf6266963bd1819f1ded2cc5 SHA-1: a1e7c07def5b3faa8a44b746f2df24f044105b66 SHA-256: aca5403739c34b5105b8ae579697b311625627a1660d587718defa7e27794561
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One of the embedded URLs, 'https://ttraff.cc/pify?keyword=disclaimer+audit+report+sample', is identified as a malicious redirector. The document body, though heavily obfuscated, contains this same URL, suggesting the primary intent is to redirect the user to malicious infrastructure.

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.cc/pify?keyword=disclaimer+audit+report+sample
    • http://files.rainshadowarmory.com/uploads/1/3/0/7/130775200/befujozedesifira.pdf
    • http://files.liosch.com/uploads/1/3/1/6/131606101/223d657.pdf
    • https://cdn.shopify.com/s/files/1/0434/3506/5505/files/bsc_1st_year_maths_algebra_book.pdf
    • https://cdn.shopify.com/s/files/1/0445/4537/6420/files/how_to_grow_watermelon_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0431/8799/4792/files/15917044276.pdf
    • https://cdn.shopify.com/s/files/1/0428/9203/4211/files/na_k_atpase_pump.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1317992411.pdf
    • https://cdn.shopify.com/s/files/1/0431/2639/0951/files/14900697996.pdf
    • https://cdn.shopify.com/s/files/1/0435/6171/3813/files/kotizeparopojew.pdf
    • https://cdn.shopify.com/s/files/1/0433/3826/8827/files/vijerem.pdf
    • https://cdn.shopify.com/s/files/1/0428/7427/3948/files/designing_brand_identity_download.pdf
    • https://cdn.shopify.com/s/files/1/0443/0246/7228/files/binary_numbers_table.pdf
    • https://cdn.shopify.com/s/files/1/0434/4161/9105/files/bounce_tales_2_java_game_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/9167/2736/files/devebiwenafejak.pdf
    • https://cdn.shopify.com/s/files/1/0428/3292/0739/files/avs_video_editor_windows_7_free.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_off0000d768.bin
ef5c956f715348d37114bd09dbe2e8f7d931c0b03f9d938185b281485495b7ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD768 5220 bytes
font_01_sfnt_off0000e900.bin
0fe4999823f231d387ca1e9b7a6bd91bf032abcceb9d7bd7a6f4e267313bd680		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE900 10208 bytes

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