Malicious PDF — malware analysis report

Static analysis result for SHA-256 38b4c81a29a743b5…

MALICIOUS

PDF

41.1 KB Created: 2020-08-14 23:34:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 20b15802527f4f7883f575d518d36fe7 SHA-1: ecce5c130baf3d7ad578e47cfbadad44c8a20e3d SHA-256: 38b4c81a29a743b5e85f8d1551df936dbbb7463ad838672d264d2f4f98d30f44
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially corrupted, contains text related to 'Gdpr article 15 response template' and the malicious URL, suggesting a phishing or scam lure. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm used to obscure the final malicious destination. No scripts were extracted from this sample.

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.ru/pify?keyword=gdpr+article+15+response+template
    • http://files.humanitiesnd.org/uploads/1/3/1/4/131408465/nopiwutizojewizuj.pdf
    • http://files.theporterauthority.com/uploads/1/3/0/7/130776245/gamujobi-safifapax-jovog.pdf
    • http://zetoxe.annalisavivona.com/uploads/1/3/1/4/131437792/6aba9f75b7cd3.pdf
    • http://vuvalebi.amityschuyler.com/uploads/1/3/2/6/132695478/famuvito.pdf
    • https://cdn.shopify.com/s/files/1/0432/7017/6932/files/cancionero_navideno_boricua.pdf
    • https://cdn.shopify.com/s/files/1/0433/9980/7126/files/72025622123.pdf
    • https://cdn.shopify.com/s/files/1/0431/3179/7668/files/ford_mustang_brochure.pdf
    • https://cdn.shopify.com/s/files/1/0430/3604/9571/files/excel_vba_worksheetfunction._match_range.pdf
    • https://cdn.shopify.com/s/files/1/0432/4219/3058/files/mifasolurezol.pdf
    • https://cdn.shopify.com/s/files/1/0431/5709/4551/files/free_bracket_generator.pdf
    • https://cdn.shopify.com/s/files/1/0452/4271/2221/files/boeing_777x_specifications.pdf
    • https://cdn.shopify.com/s/files/1/0433/8168/6439/files/94779852457.pdf
    • https://cdn.shopify.com/s/files/1/0438/1265/1170/files/80750317662.pdf
    • https://cdn.shopify.com/s/files/1/0437/2480/0154/files/happy_hemispheres_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/0623/8626/files/nfl_week_9.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_off00006328.bin
717d2775461b54f2c88b61673daf90888ca0649b2d4a498095c7bad3dbf40e38
pdf-font-stream PDF embedded font (sfnt) at offset 0x6328 5428 bytes
font_01_sfnt_off0000758f.bin
af9374eeaf1808114660304a2f4019e76266a731bbad6b969a2c4f33f7750079
pdf-font-stream PDF embedded font (sfnt) at offset 0x758F 10044 bytes