Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc7dded3eb21f03d…

MALICIOUS

PDF

46.9 KB Created: 2020-08-15 05:39:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e68650c96177428ea32f446dde6f32da SHA-1: 7fda00bf9ec82d8c6bf777eba305b762a4e20b4c SHA-256: cc7dded3eb21f03da0e4f5e545a40e84c668b0fea4b62e44c24caee2a65e2431
154 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a suspicious redirector URL (https://ttraff.cc/pify?keyword=chamberlain+b970+manual) that is likely used to lead the user to malicious content. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains text related to a 'Chamberlain b970 manual', suggesting a lure to trick users into clicking the malicious link.

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=chamberlain+b970+manual
    • http://jirela.intheskin.net/uploads/1/3/0/8/130873952/wabadodomidaxu_jifumuxebaber_sasejumu_xedafukatukax.pdf
    • http://files.terrencejon.com/uploads/1/3/0/8/130874361/vaxerawej.pdf
    • http://files.thecookieencounter.com/uploads/1/3/1/6/131636772/8311493.pdf
    • http://bofagibe.aggiesigns.org/uploads/1/3/1/8/131856543/kuvikotiwel.pdf
    • https://cdn.shopify.com/s/files/1/0434/9621/0594/files/66596922094.pdf
    • https://cdn.shopify.com/s/files/1/0447/2176/6556/files/bonavijumob.pdf
    • https://cdn.shopify.com/s/files/1/0427/8091/7926/files/lofepavapuzixaxagaxasoxud.pdf
    • https://cdn.shopify.com/s/files/1/0427/6345/2583/files/numpy_rotate_vector.pdf
    • https://cdn.shopify.com/s/files/1/0428/7057/1174/files/25986752249.pdf
    • https://cdn.shopify.com/s/files/1/0448/0778/2557/files/receta_de_carnitas_estilo_michoacan.pdf
    • https://cdn.shopify.com/s/files/1/0440/7400/8726/files/79586285162.pdf
    • https://cdn.shopify.com/s/files/1/0427/6033/9623/files/vobux.pdf
    • https://cdn.shopify.com/s/files/1/0437/6428/5601/files/24991054193.pdf
    • https://cdn.shopify.com/s/files/1/0437/7726/1729/files/lean_bulking_workout.pdf
    • https://cdn.shopify.com/s/files/1/0434/4751/7341/files/44455688246.pdf
    • https://cdn.shopify.com/s/files/1/0429/9233/7059/files/63219396398.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006330.bin
8b0c3c5e4d5bde4095c6e9f32cb140954ed599ff94c6f327e8ac9f8916f4c5f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6330 5172 bytes
font_01_sfnt_off0000749f.bin
bc13f697359f0d277070f433489cda10686ae0749f8080e462513c30032ca14e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x749F 10788 bytes
font_02_sfnt_off000099b3.bin
672a6013c4006969f1876bd4478619ec6c8e959308a53bc6da81b9f6ec04033e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99B3 16088 bytes

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