Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2a02c5b913957b5…

MALICIOUS

PDF

44.0 KB Created: 2020-08-09 13:48:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a53ca6b8f106240bd2281e56bc01bdc SHA-1: ad3ab1c3939a127e21008c55887daeea1508e61b SHA-256: d2a02c5b913957b58c6d06feb522de196b00ee8776730775ae78ac972d9ce89e
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'air quality definition pdf' and includes the malicious URL. This suggests a phishing or redirection attack where the user is tricked into clicking the link, likely leading to further malicious content or malware download.

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=calidad+del+aire+definicion+pdf
    • http://files.katebraithwaite.co.uk/uploads/1/3/2/6/132682989/sinolexivibi-novox-kovuwefelazu.pdf
    • http://files.rebeccagrayyoga.com/uploads/1/3/1/4/131406827/bebezamakosa.pdf
    • http://files.connemaradancers.com/uploads/1/3/0/9/130969399/xamebanorug.pdf
    • http://files.skylinemediacast.com/uploads/1/3/0/9/130969206/7a3965fc9affed7.pdf
    • https://cdn.shopify.com/s/files/1/0430/6858/8194/files/xapepojoje.pdf
    • https://cdn.shopify.com/s/files/1/0434/4279/8757/files/31002697077.pdf
    • https://cdn.shopify.com/s/files/1/0450/4292/5726/files/market_segmentation_definition_and_examples.pdf
    • https://cdn.shopify.com/s/files/1/0431/6053/5196/files/32078828185.pdf
    • https://cdn.shopify.com/s/files/1/0429/7529/7689/files/68313711712.pdf
    • https://cdn.shopify.com/s/files/1/0434/7753/2822/files/13837528550.pdf
    • https://cdn.shopify.com/s/files/1/0438/0770/3201/files/best_books_of_all_time.pdf
    • https://cdn.shopify.com/s/files/1/0430/5590/6967/files/operations_and_supply_chain_management_jacobs.pdf
    • https://cdn.shopify.com/s/files/1/0436/6175/4518/files/gadaxelo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vufofabiziterefabul.pdf
    • https://cdn.shopify.com/s/files/1/0434/6439/2866/files/nibosovuvanedusu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/birizakidunupujudexi.pdf
    • https://cdn.shopify.com/s/files/1/0434/3706/4348/files/tryndamere_build_jungle.pdf
    • https://cdn.shopify.com/s/files/1/0438/8693/6219/files/82404717831.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a87.bin
3ecce0efb4dc4ef4f9f0ce9a1ffd03348d7cbf24a44e629168cf2539e564ad61
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A87 4876 bytes
font_01_sfnt_off00007b2a.bin
78a17ef4562ebbfcc8ce8fea6e7307ee723e24d38a505cab5c2291500caa00da
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B2A 11712 bytes