Malicious PDF — malware analysis report

Static analysis result for SHA-256 51a0af026d60fbdf…

MALICIOUS

PDF

41.5 KB Created: 2020-08-11 04:41:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8c092ead6386d4366595c069e7a22212 SHA-1: b6919ba4111e4297940ecfd4e0a699cf4cad87c5 SHA-256: 51a0af026d60fbdff84bd68833851edfcbd73c8f12f45fb638d296f28507cb6f
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 firing indicating a malicious redirector. The document body, though heavily obfuscated, contains text suggesting it is a PDF related to calculus problems, likely a lure. The primary malicious IOC is the redirector URL, which is designed to lead users to further malicious content.

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=integral+calculus+problems+with+answers+pdf
    • http://files.heartsonfireaussies.com/uploads/1/3/2/6/132681322/wezatuxemefefimewa.pdf
    • http://files.josephflaviusrice.com/uploads/1/3/0/8/130815095/nemezorumep_nejifulazu_tujope_xegadawax.pdf
    • http://files.stdavidsucc.com/uploads/1/3/1/4/131453615/f81924.pdf
    • http://files.nikkisoultosole.co.uk/uploads/1/3/1/3/131379510/vepebifabipagiv_zakifaxasuxiz.pdf
    • https://cdn.shopify.com/s/files/1/0434/6114/8832/files/27011106974.pdf
    • https://cdn.shopify.com/s/files/1/0428/7230/7875/files/vodekav.pdf
    • https://cdn.shopify.com/s/files/1/0435/6728/4379/files/fiwik.pdf
    • https://cdn.shopify.com/s/files/1/0433/4452/7528/files/51690598212.pdf
    • https://cdn.shopify.com/s/files/1/0427/6027/4087/files/akutagawa_ryunosuke_kappa.pdf
    • https://cdn.shopify.com/s/files/1/0430/8962/5241/files/bojiw.pdf
    • https://cdn.shopify.com/s/files/1/0433/7369/1045/files/java_how_to_read_a_text_file.pdf
    • https://cdn.shopify.com/s/files/1/0434/5544/7201/files/organic_chemistry_2nd_edition_david_klein.pdf
    • https://cdn.shopify.com/s/files/1/0430/8320/2711/files/90063912925.pdf
    • https://cdn.shopify.com/s/files/1/0432/7289/6672/files/pumagamubin.pdf
    • https://cdn.shopify.com/s/files/1/0444/5303/6199/files/automation_test_strategy_document.pdf
    • https://cdn.shopify.com/s/files/1/0441/1283/8808/files/99158462079.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/
    • https://cdn.shopify.com/s/files

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000630f.bin
5f40d0e94ed7f3af87be4c1ef10923db9eeaae31293458ca7c85107996018f53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x630F 5736 bytes
font_01_sfnt_off00007670.bin
beda1004ebc3275bf3f68cee918f8c78bb8152171316fa124d385cdaec5ffdfa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7670 9912 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.