Malicious PDF — malware analysis report

Static analysis result for SHA-256 22fe135f204afa4f…

MALICIOUS

PDF

57.2 KB Created: 2020-08-07 14:55:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1e55d938f9c34fe536a4e25a376b9b56 SHA-1: bf864960b5ad11c73047fcc1b45e256697b5a239 SHA-256: 22fe135f204afa4f557dcfc61f980b76dd41a3adba2cf329059e0aafc364bbc5
152 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous external PDF files, with one primary redirector URL identified as malicious. The document body, though heavily obfuscated, contains the malicious URL and text suggesting a lure related to an 'allopathic medicine dictionary pdf'. The ML classifier strongly indicated maliciousness, and the presence of a known malicious redirector confirms the intent to lead users to harmful content.

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=allopathic+medicine+dictionary+pdf
    • http://files.gwenjacksonstories.com/uploads/1/3/1/6/131637308/deluvizenax.pdf
    • http://files.cottonwoodpedsgi.com/uploads/1/3/1/4/131452861/fuvabepolixivemep.pdf
    • http://files.rleveille.com/uploads/1/3/1/8/131871864/gires.pdf
    • https://cdn.shopify.com/s/files/1/0431/1715/0357/files/mamibamotijonozenuvogijug.pdf
    • https://cdn.shopify.com/s/files/1/0431/1557/7504/files/68045697720.pdf
    • https://cdn.shopify.com/s/files/1/0432/1227/5876/files/1946337576.pdf
    • https://cdn.shopify.com/s/files/1/0428/1293/2255/files/48435214161.pdf
    • https://cdn.shopify.com/s/files/1/0434/4853/3142/files/pagafidazajavezor.pdf
    • https://cdn.shopify.com/s/files/1/0430/5072/9621/files/50620732690.pdf
    • https://cdn.shopify.com/s/files/1/0429/4931/2665/files/wefiserifixopu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3124/8542/files/43875517194.pdf
    • https://cdn.shopify.com/s/files/1/0434/0868/7269/files/womadumexi.pdf
    • https://cdn.shopify.com/s/files/1/0433/4642/8072/files/66279569676.pdf
    • https://cdn.shopify.com/s/files/1/0430/0718/0959/files/xisijaguwofimokadugid.pdf
    • https://cdn.shopify.com/s/files/1/0430/1615/9381/files/30450607154.pdf
    • https://cdn.shopify.com/s/files/1/0433/2938/8699/files/bodmas_worksheets_for_grade_9.pdf
    • https://cdn.shopify.com/s/files/1/0435/4015/2475/files/55152589044.pdf
    • https://cdn.shopify.com/s/files/1/0437/3518/7605/files/lowes_somerset_ky.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_off000090d0.bin
add62928783d0211cddada34669c99b9020264c625b9841bb10fc8d66abf4182		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90D0 5096 bytes
font_01_sfnt_off0000a1f8.bin
23670ebdc7ca5d0b2ef72ff16c9df240d730301c643af962d2dcfd10597db5ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA1F8 11632 bytes
font_02_sfnt_off0000c8d5.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC8D5 4324 bytes

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