Malicious PDF — malware analysis report

Static analysis result for SHA-256 b90dd821a068274f…

MALICIOUS

PDF

74.7 KB Created: 2020-08-14 21:44:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 792c36ff1e7338273b3afa7365e60aa1 SHA-1: a1a8998ce00d70a7c4c654fe05f784eb6bb7a67a SHA-256: b90dd821a068274f5e48558048494c10bed11c67619d4028fb2e4017252aa621
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=capital+employed+balance+sheet'. Additionally, it exhibits a PDF link farm heuristic, with numerous links to external PDFs, many hosted on shopify.com. The document body, though heavily obfuscated, contains the same redirector 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.ru/pify?keyword=capital+employed+balance+sheet
    • http://files.pridegirlslacrosse.com/uploads/1/3/2/8/132814272/4068723.pdf
    • http://digupa.goatskins.com/uploads/1/3/1/4/131407300/4605077.pdf
    • http://files.lacedbyleshea.com/uploads/1/3/0/7/130775679/fasalifolumokat.pdf
    • http://files.etopp13.org/uploads/1/3/0/7/130775106/galupuletuf-rigirabusubene-resasur.pdf
    • https://cdn.shopify.com/s/files/1/0431/7780/3925/files/66513226455.pdf
    • https://cdn.shopify.com/s/files/1/0432/3295/2477/files/92573590301.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nagexonulelaxefirulilona.pdf
    • https://cdn.shopify.com/s/files/1/0438/2975/6066/files/55156293709.pdf
    • https://cdn.shopify.com/s/files/1/0432/5310/4790/files/35762545094.pdf
    • https://cdn.shopify.com/s/files/1/0430/0252/7895/files/wawovuriv.pdf
    • https://cdn.shopify.com/s/files/1/0437/2817/5255/files/82131854284.pdf
    • https://cdn.shopify.com/s/files/1/0432/0477/1999/files/mebiwilogopulimopuvez.pdf
    • https://cdn.shopify.com/s/files/1/0428/2348/3548/files/53347155362.pdf
    • https://cdn.shopify.com/s/files/1/0437/6756/2391/files/41710121375.pdf
    • https://cdn.shopify.com/s/files/1/0431/1918/1978/files/46127081400.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dba9.bin
a17885b4fd577e0298a64705d5055d2ac7c2363fd7008e9cf236b3df412a17d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA9 2828 bytes
font_01_sfnt_off0000e5a3.bin
cadfad487369b8524435aff0aebe57b4b8c54b4daa892a2ffd9cdbf89cccdb69		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A3 5364 bytes
font_02_sfnt_off0000f7bc.bin
7ac7d784ea0d30fa2410ea5d2f746716c00e64004331cdf1e2a4a578b6a9d9c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7BC 11136 bytes

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