Malicious PDF — malware analysis report

Static analysis result for SHA-256 cde3c613deac7eae…

MALICIOUS

PDF

43.9 KB Created: 2020-08-22 15:23:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1a08805553ba61fa647fe0d26f0106d SHA-1: eaa0f16e20c97f5c8b97dcc2a874c1a7cd0d9fc4 SHA-256: cde3c613deac7eaef7f002c9e5e65bf5f62886fc2aaddf919547bd027833da4a
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final malicious destination. The document body, though heavily obfuscated, contains the same URL and a reference to 'wkhtmltopdf', suggesting it's a generated document. The presence of numerous Shopify links, while mostly benign, is characteristic of SEO poisoning techniques used to distribute malicious documents. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=attestazione+di+conformit%25C3%25A0+cartaceo+avvocato
    • http://mufufuju.huneremin.com/uploads/1/3/2/8/132814930/gaxokaxajalapaxo.pdf
    • https://cdn.shopify.com/s/files/1/0433/3817/0526/files/cracked_dinosaur_egg_template.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/god_favored_me_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0430/4535/5674/files/springing_tiger.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nemopijudesukofareran.pdf
    • https://cdn.shopify.com/s/files/1/0430/6996/4439/files/57672373317.pdf
    • https://cdn.shopify.com/s/files/1/0430/1779/7785/files/gufonez.pdf
    • https://cdn.shopify.com/s/files/1/0437/3892/3169/files/algebraic_and_geometric_multiplicity.pdf
    • https://cdn.shopify.com/s/files/1/0438/8831/2488/files/terminator_6_2019.pdf
    • https://cdn.shopify.com/s/files/1/0433/8922/3066/files/94380178146.pdf
    • https://cdn.shopify.com/s/files/1/0433/2843/8440/files/905_cdta.pdf
    • https://cdn.shopify.com/s/files/1/0447/3962/5111/files/aleks_math_placement_practice_test.pdf
    • https://cdn.shopify.com/s/files/1/0429/6356/6755/files/46193054365.pdf
    • https://cdn.shopify.com/s/files/1/0437/2827/3569/files/nudezapoju.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_off00005e22.bin
cbb5fb94e99be5cb31dca598f287a5479dcf7a0b84c9a85d51b306ce2683328b
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E22 5256 bytes
font_01_sfnt_off00006f63.bin
f764259cabcddbbe03e6750095f196517244ce6abff75794259460c829cfdbd4
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F63 10684 bytes
font_02_sfnt_off0000920a.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x920A 4324 bytes