Malicious PDF — malware analysis report

Static analysis result for SHA-256 e215ea112f964927…

MALICIOUS

PDF

41.3 KB Created: 2020-09-01 03:30:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1eb270ef2be3fdd858419ef385056549 SHA-1: eb2ecbf973790ea91d232e8ffd628e8267fe45ee SHA-256: e215ea112f9649279ce52836ac62f2adfd0b9eaf0021fd8242b1c784618a3a35
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL https://ttraff.cc/pify?keyword=miss+universe+2017+philippines+question+and+answer, which is also listed as a malicious redirector. The presence of a link farm further suggests an attempt to distribute malicious content or phish users.

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=miss+universe+2017+philippines+question+and+answer
    • https://cdn.shopify.com/s/files/1/0438/2192/4514/files/pdf_to_word_ocr_windows.pdf
    • https://cdn.shopify.com/s/files/1/0432/5359/6322/files/bhawanipur_college_kolkata_admission_form_2018.pdf
    • https://cdn.shopify.com/s/files/1/0431/7793/5005/files/84455756010.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/46552055365.pdf
    • https://cdn.shopify.com/s/files/1/0436/5769/1289/files/99147180297.pdf
    • https://static.usrfiles.com/ugd/b8c837_ba385a38c96a47f6959ba425c99e3d8d.pdf
    • https://static.usrfiles.com/ugd/cc03df_16b3b12fd5584de090e583a9cbcf7557.pdf
    • https://static.usrfiles.com/ugd/b8c837_503c35e2818447708bc4829cb2d6c3bc.pdf
    • https://static.usrfiles.com/ugd/aef5b7_3a71709b2a3f403cad52d9c852ee8aba.pdf
    • https://static.usrfiles.com/ugd/078c79_9e6998cad2984bcea79cc6a50ed02214.pdf
    • https://cdn.shopify.com/s/files/1/0432/2990/5058/files/53528226996.pdf
    • https://cdn.shopify.com/s/files/1/0439/2602/8456/files/dufagopuxojovufofadepit.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/
    • https://cdn.shopify.com/s/files/1/0439/2602/8456/files/dufag

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060d8.bin
bbed9cf6dbb0d8cc8709efb6452c3642042b0be5b22a4a17017b2a0eef562aae
pdf-font-stream PDF embedded font (sfnt) at offset 0x60D8 5736 bytes
font_01_sfnt_off0000747e.bin
3f23bad173d3264bf7383c81b1af0a0637a3b1d7a5ad07acfac226914ac4f686
pdf-font-stream PDF embedded font (sfnt) at offset 0x747E 10380 bytes