Malicious PDF — malware analysis report

Static analysis result for SHA-256 69f213fd81301e95…

MALICIOUS

PDF

34.9 KB Created: 2020-08-31 18:18:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 49414523ff77bd12c22ef546ba9528b1 SHA-1: 8d7f771dc5a4947a6513a41ee249cebeab89791d SHA-256: 69f213fd81301e95d1c6d571c2573ae0f5fcf073e9f43d3c759a94094a798ade
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, including one to a known malicious redirector, disguised as free coloring pages. The ML classifier strongly indicates maliciousness. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious infrastructure, likely for phishing or malware distribution.

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/wix?keyword=free+sugar+skull+coloring+pages+pdf In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0253/5840/files/48714134752.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/2735/4015/files/tujobufogab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8528/2980/files/anti_entropy_thermo-nullifier.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7133/1734/files/pdf_printing_blank_page_mac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9660/4825/files/dunojajo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/7688/6168/files/organizational_design_process_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9243/4334/files/28906677456.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2093/3528/files/sql_tutorial_point_full.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a1fb72_0c5c8f040a0e4d49babe3fcaa9eed6c1.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b4609a_0872428ca1334c409a2c4ce41233c5d5.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/37321e_c492a3ca10d24dc58231bd039fdb012b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/162fe6_55168cdda9e64109b44b8a73a7864349.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/7f16bd_2f1316dba77b4e1db12e92874a6477a2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0629/5196/files/1991_toyota_corolla_owners_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2891/9973/files/gufan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0094/5048/files/akama_miki_and_zhang_muyi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2108/0475/files/fejaresinetosirokawa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2341/4942/files/wizatisarupak.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a8f.bin
6b67d694e2bbfba5ece1b08ef69a78c1fdba02c34fe9b636de03e9a84c9da3d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A8F 5344 bytes
font_01_sfnt_off00005cd3.bin
9267fedbc1b7f41580dd1b413352926bea30f28240e41899863eb02b3e43c088		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CD3 10476 bytes

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