Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddf0bb00e9db69ce…

MALICIOUS

PDF

35.3 KB Created: 2020-08-05 13:35:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 14e970bf260a053fc6e73524019aabf2 SHA-1: fb48a41437e1a52f048f6101b9216b8d20dba6a6 SHA-256: ddf0bb00e9db69ce465d2afaf755bb18e021164291441f689268af28ab7d9222
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link to a known malicious redirector at ttraff.ru. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains the URL https://ttraff.ru/pify?keyword=capital+expenditure+and+economic+growth+pdf, suggesting a lure to a malicious site disguised as an academic paper.

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=capital+expenditure+and+economic+growth+pdf
    • http://files.schnauzersetc.net/uploads/1/3/0/7/130739060/gesafizolu-xipowo.pdf
    • http://files.sirsdigitalcommerce.com/uploads/1/3/2/3/132303035/398525744a50b.pdf
    • http://zinuro.childrenswarehousenyc.com/uploads/1/3/2/6/132681556/5955a26539ef5b4.pdf
    • https://cdn.shopify.com/s/files/1/0433/7877/0076/files/gekesufegifutedegetusifit.pdf
    • https://cdn.shopify.com/s/files/1/0434/5584/0422/files/20329395772.pdf
    • https://cdn.shopify.com/s/files/1/0445/2660/0351/files/simple_personality_test_for_students.pdf
    • https://cdn.shopify.com/s/files/1/0433/6363/1272/files/gesawuzifagowo.pdf
    • https://cdn.shopify.com/s/files/1/0431/2412/9946/files/12855463662.pdf
    • https://cdn.shopify.com/s/files/1/0428/3197/0471/files/57711061216.pdf
    • https://cdn.shopify.com/s/files/1/0428/3380/5471/files/mowowemalapekedupar.pdf
    • https://cdn.shopify.com/s/files/1/0437/6431/8359/files/macports_vs_homebrew.pdf
    • https://cdn.shopify.com/s/files/1/0434/6583/4658/files/47818765025.pdf
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/lexovupalazoberatuxoto.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/peposorutap.pdf
    • https://cdn.shopify.com/s/files/1/0437/7991/5934/files/nakubikemuw.pdf
    • https://cdn.shopify.com/s/files/1/0429/8155/6375/files/tesevusu.pdf
    • https://cdn.shopify.com/s/files/1/0435/1698/5503/files/46040424530.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_off000049fe.bin
f2d9d1e53364eb9944328b64cbedd56564f56bebf413075c3090fc93f31b59d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x49FE 5456 bytes
font_01_sfnt_off00005c77.bin
1f32753ebaad0834eeb796515e3dedae167925a43c1e4880410cd47dc1426008		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C77 10548 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.