Malicious PDF — malware analysis report

Static analysis result for SHA-256 27e86a7f367d612b…

MALICIOUS

PDF

57.0 KB Created: 2020-08-29 22:28:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a58442c47946691acb7894c32d0788bf SHA-1: 8f560add53cd52711e9c497e18f547f98db69966 SHA-256: 27e86a7f367d612b5a1dad0c4446ce10a7f4feffb49ea8bf2289599f4ea68316
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.cc', which is used in a lure for 'digital logic design pdf free download'. Additionally, a PDF link farm heuristic indicates the presence of numerous external links, many pointing to Shopify domains, suggesting an attempt to obscure the malicious redirector or to appear as a legitimate resource. The presence of a download button lure further supports the deceptive nature of the document.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=digital+logic+design+pdf+free+download
    • https://cdn.shopify.com/s/files/1/0438/5341/4565/files/circulatory_system_notes.pdf
    • https://cdn.shopify.com/s/files/1/0434/5744/6041/files/62338906906.pdf
    • https://cdn.shopify.com/s/files/1/0433/4472/4133/files/16725299693.pdf
    • https://cdn.shopify.com/s/files/1/0430/9997/9930/files/55336244545.pdf
    • https://cdn.shopify.com/s/files/1/0435/3599/0936/files/activities_for_very_young_learners.pdf
    • https://cdn.shopify.com/s/files/1/0455/7062/1605/files/animal_classification_word_search.pdf
    • https://cdn.shopify.com/s/files/1/0434/7304/3622/files/vapor_compression_refrigeration_cycle_problems.pdf
    • https://cdn.shopify.com/s/files/1/0429/7018/5879/files/trade_and_balance_of_payments.pdf
    • https://static.usrfiles.com/ugd/0dd040_a5a05eb096f94b76a7a9577fa6594f07.pdf
    • https://static.usrfiles.com/ugd/b8c837_a869920c2be9433d96f3d89cfd14d061.pdf
    • https://static.usrfiles.com/ugd/ea9bdf_861c7c9953b14705a778b3dcff192595.pdf
    • https://cdn.shopify.com/s/files/1/0428/8125/3535/files/free_worksheets_for_third_grade_read.pdf
    • https://cdn.shopify.com/s/files/1/0435/7708/2019/files/24553287684.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006732.bin
b5efeea00bef92d6b84f62428242db0623ec32ecbf35ddaff1eabd31fe727bde		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6732 5416 bytes
font_01_sfnt_off000079b5.bin
7bb91423d63eb6bd7c2657278979848d60b7d38679106ec23dbd755ba6ab3d32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79B5 2320 bytes
font_02_sfnt_off00008405.bin
d6437786defdfd63f68dbb10b396963d323eac4a29f008ec0521c4e942e0aa9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8405 14000 bytes
font_03_sfnt_off0000b097.bin
5f3bf50395e8d1b65f29ab90a426c3665da69f8437ae50e88eef237d5e22552a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB097 16224 bytes
font_04_sfnt_off0000c61e.bin
d3c7657556295dc9c2a00f4d257fe1e9127064d6abd5a48be7f29aa542f64ab2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC61E 4364 bytes

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