Malicious PDF — malware analysis report

Static analysis result for SHA-256 345387094424a644…

MALICIOUS

PDF

36.2 KB Created: 2020-08-20 14:28:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 91973c325b53aac660db7863e0885088 SHA-1: a788b25200a41648e1305ad0d6c712fedd2f9ee6 SHA-256: 345387094424a6442d472ce3f5b57d88f6b6284df7141e97c4811046e341ff82
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that is also flagged as a malicious redirector. This suggests the primary purpose is to direct users to malicious sites, likely for phishing or malware delivery.

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.cc/pify?keyword=alif+se+video+song++bestwap
    • http://files.seanmindbodymechanic.com/uploads/1/3/1/0/131070374/a63dcad23d75.pdf
    • http://vagitelot.shaydanielleacademy.com/uploads/1/3/1/4/131406893/pejipesowanizeja.pdf
    • https:///a10.gaana
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/1266/1152/files/cloudformation_template_output_export.pdf
    • https://cdn.shopify.com/s/files/1/0433/9469/5318/files/logowakev.pdf
    • https://cdn.shopify.com/s/files/1/0428/0900/0103/files/13094012219.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wesuwalaloluxafim.pdf
    • https://cdn.shopify.com/s/files/1/0429/2087/0044/files/88301014603.pdf
    • https://cdn.shopify.com/s/files/1/0440/9786/3832/files/metivexer.pdf
    • https://cdn.shopify.com/s/files/1/0434/4178/2946/files/rulamakeju.pdf
    • https://cdn.shopify.com/s/files/1/0431/6708/8800/files/8720034072.pdf
    • https://cdn.shopify.com/s/files/1/0438/2208/8354/files/mazixedizimanonifa.pdf
    • https://cdn.shopify.com/s/files/1/0435/8363/5619/files/vuverazidiruput.pdf
    • https://cdn.shopify.com/s/files/1/0432/9360/6046/files/58007404106.pdf
    • https://cdn.shopify.com/s/files/1/0428/8613/5961/files/pakistan_economics_mcqs_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0437/4121/6922/files/english_important_words_to_learn.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/68876684382.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004dd4.bin
83a82af6199a0d866d21e40946ccbcab1aa23abd72d3cfdf7a1313ca01db16f1
pdf-font-stream PDF embedded font (sfnt) at offset 0x4DD4 5396 bytes
font_01_sfnt_off00006054.bin
902840f72c8e8a5e3541ab822289b0c72f606ad26c3015216975805c743cc207
pdf-font-stream PDF embedded font (sfnt) at offset 0x6054 10640 bytes