Malicious PDF — malware analysis report

Static analysis result for SHA-256 798f8c2613c80a33…

MALICIOUS

PDF

47.1 KB Created: 2020-08-31 09:44:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2174ef77b4d4198c8f8af29b6ac70500 SHA-1: 52e4912236bd5a4e752e2ebf83ecc4d554803b2e SHA-256: 798f8c2613c80a33e24db1fc8ec164ef296e110104b9e373ba3c688d75cf9ee4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, with one critical heuristic identifying it as a malicious redirector pointing to 'ttraff.com'. Another heuristic confirms it's a link farm, suggesting an attempt to drive traffic to potentially malicious or spam content. The ML classifier strongly indicates maliciousness, supporting the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.com/wix?keyword=hebrew+bible+genesis
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/2937/2832/files/14965660577.pdf
    • https://cdn.shopify.com/s/files/1/0432/5530/0249/files/css_media_queries_for_mobile.pdf
    • https://cdn.shopify.com/s/files/1/0435/8724/0095/files/82442844027.pdf
    • https://cdn.shopify.com/s/files/1/0435/8779/7160/files/fijikujaveme.pdf
    • https://cdn.shopify.com/s/files/1/0434/7461/6472/files/free_java_version_1._7_64_bit.pdf
    • https://cdn.shopify.com/s/files/1/0439/5555/2414/files/karate_kid_streaming_vf.pdf
    • https://cdn.shopify.com/s/files/1/0435/4398/6335/files/48186556453.pdf
    • https://cdn.shopify.com/s/files/1/0431/3343/6055/files/alice_in_wonderland_coloring_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/4891/8440/files/aac_audio_file_cutter_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/7179/8436/files/faxavazijipi.pdf
    • https://cdn.shopify.com/s/files/1/0462/2440/8730/files/janotujipusasevol.pdf
    • https://cdn.shopify.com/s/files/1/0428/2528/5798/files/13735813741.pdf
    • https://cdn.shopify.com/s/files/1/0465/9521/1429/files/teacher_guidelines_maths.pdf
    • https://cdn.shopify.com/s/files/1/0431/3461/5706/files/20941876334.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006673.bin
f3f53daed9f2cb67d9fa09deb920c1b3d7ac89512abdfa0094ab9a8e0e596069		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6673 4836 bytes
font_01_sfnt_off00007708.bin
b30b92983f14ed2c5bedfc8f80101f8a3566533fbcdcd07bda6992e357978f5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7708 10336 bytes
font_02_sfnt_off00009a4f.bin
cfd0c46e63173d1eef45245a809dd55da8a4a1b26c1ba8cab277f4c6d5910e07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A4F 16100 bytes

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